Sekaiichi Hatsukoi (Yaoi) manga

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Nakamura Shungiku 2000 released.
Comedy / Drama / Romance / Slice Of Life / Yaoi
世界一初恋 ~小野寺律の場合~; 世界第一初恋; 世界第一初戀; Sekai Ichi Hatsukoi - Onodera Ritsu no Baai; Sekai-ichi Hatsukoi; Sekai-ichi Hatsukoi - Yukina Kou no Baai; Sekaiichi Hatsukoi - Kisa Shouta no Baai; Sekaiichi Hatsukoi - Onodera Ritsu no Baai; The Case of Onodera Ritsu; World's Greatest First Love: Ritsu Onodera's Affair; World's Greatest First Love: The Case of Onodera Ritsu
Vol.9 Ch.2
Vol.9 Ch.1.1
Vol.8 Ch.11
 9.6
1591 voted
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Summary

The following content is intended for mature audiences and may contain sexual themes, gore, violence and/or strong language. Discretion is advised.

Sekaiichi Hatsukoi ~Onodera Ritsu no Baai~
Onodera Ritsu has just transferred from his father's publishing company to Marukawa Shoten. Assigned to the shoujo manga division, he crosses path with the person he'd least expected to meet. Takano Masamune is the editor-in-chief of the division Ritsu's been assigned to, and the two seem get off on the wrong foot right from the very start when Takano unexpectedly kisses him. However, there is more to than what meets the eye: Takano is actually Saga, Ritsu's senpai and high school love-- whom Ritsu had thought to have played him for a fool by taking his affections for granted when he confessed and summarily dumped him. (from zero_kiryuu)
loosely connected to Junjou Romantica (Usami Akihiko's name's in here!)

Sekaiichi Hatsukoi ~Kisa Shouta no Baai~

The second story tells about Ritsu's colleague Kisa Shouta
who works with him at Marukawa Shoten's Emerald shoujo
manga department and ever smiling, suave and irresistably handsome Kou Yukina. 

Photos about this manga

(All 301)

Other manga by the same author(s)

Chapters(55)

Sekaiichi Hatsukoi Vol.9 Ch.2

May 10, 2015

Sekaiichi Hatsukoi Vol.9 Ch.1.1 : Vol 09Onodera Ritsu no Baai vol 9 extras

Feb 19, 2015

Sekaiichi Hatsukoi Vol.8 Ch.11 : Vol 08The Case of Onodera Ritsu vol 20

Feb 19, 2015

Sekaiichi Hatsukoi Vol.8 Ch.10 : Vol 08The Case of Onodera Ritsu vol 19

Feb 19, 2015

Sekaiichi Hatsukoi Vol.8 Ch.9 : Vol 08The Case of Onodera Ritsu vol 18

Feb 19, 2015

Sekaiichi Hatsukoi Vol.8 Ch.8 : Vol 08The Case of Onodera Ritsu vol 17

Feb 19, 2015

Sekaiichi Hatsukoi Vol.8 Ch.7.1 : Vol 08Valentine's Day Prologue

Feb 19, 2015

Sekaiichi Hatsukoi Vol.8 Ch.7 : Vol 08The case of Yukina Kou vol 2

Feb 19, 2015

Sekaiichi Hatsukoi Vol.8 Ch.6.5 : Vol 08Onodera Ritsu no Baai Volume 8 extra

Feb 19, 2015

Sekaiichi Hatsukoi Vol.8 Ch.6 : Vol 08The Case of Onodera Ritsu vol 16

Feb 19, 2015

Sekaiichi Hatsukoi Vol.8 Ch.5 : Vol 08The Case of Yokozawa Takafumi vol 3

Feb 19, 2015

Sekaiichi Hatsukoi Vol.8 Ch.4 : Vol 08The Case of Yokozawa Takafumi vol 2

Feb 19, 2015

Sekaiichi Hatsukoi Vol.8 Ch.3 : Vol 08The Case of Onodera Ritsu vol 15

Feb 19, 2015

Sekaiichi Hatsukoi Vol.8 Ch.2 : Vol 08The Case of Kisa Shouta vol 5

Feb 19, 2015

Sekaiichi Hatsukoi Vol.8 Ch.1 : Vol 08The Case of Onodera Ritsu vol 14

Feb 19, 2015

Sekaiichi Hatsukoi Vol.7 Ch.6 : Vol 07The Case of Yokozawa Takafumi vol 1

Feb 19, 2015

Sekaiichi Hatsukoi Vol.7 Ch.3.6 : Vol 07Extra Booklet

Feb 19, 2015

Sekaiichi Hatsukoi Vol.7 Ch.3.5 : Vol 07The Case of Onodera Ritsu No. 13.5

Feb 19, 2015

Sekaiichi Hatsukoi Vol.7 Ch.3 : Vol 07The Case of Onodera Ritsu vol 13

Feb 19, 2015

Sekaiichi Hatsukoi Vol.7 Ch.2 : Vol 07The case of Yukina Kou vol 1

Feb 19, 2015

Sekaiichi Hatsukoi Vol.7 Ch.1 : Vol 07The Case of Onodera Ritsu vol 12

Feb 19, 2015

Sekaiichi Hatsukoi Vol.6 Ch.3.5 : Vol 06The Case of Takano Masamune vol 1.5

Feb 19, 2015

Sekaiichi Hatsukoi Vol.6 Ch.3 : Vol 06The Case of Onodera Ritsu vol 11

Feb 19, 2015

Sekaiichi Hatsukoi Vol.6 Ch.2 : Vol 06The Case of Takano Masamune vol 1

Feb 19, 2015

Sekaiichi Hatsukoi Vol.6 Ch.1 : Vol 06The Case of Onodera Ritsu vol 10

Feb 19, 2015

Sekaiichi Hatsukoi Vol.5 Ch.13 : Vol 05The Case of Hatori Yoshiyuki vol 5

Feb 19, 2015

Sekaiichi Hatsukoi Vol.5 Ch.12 : Vol 05The Case of Hatori Yoshiyuki vol 4

Feb 19, 2015

Sekaiichi Hatsukoi Vol.5 Ch.11 : Vol 05The Case of Hatori Yoshiyuki vol 3

Feb 19, 2015

Sekaiichi Hatsukoi Vol.5 Ch.10 : Vol 05The Case of Hatori Yoshiyuki vol 2

Feb 19, 2015

Sekaiichi Hatsukoi Vol.5 Ch.9 : Vol 05The Case of Hatori Yoshiyuki vol 1

Feb 19, 2015

Sekaiichi Hatsukoi Vol.5 Ch.8 : Vol 05The Case of Yoshino Chiaki vol 4

Feb 19, 2015

Sekaiichi Hatsukoi Vol.5 Ch.7 : Vol 05The Case of Yoshino Chiaki vol 3

Feb 19, 2015

Sekaiichi Hatsukoi Vol.5 Ch.6 : Vol 05The Case of Yoshino Chiaki vol 2

Feb 19, 2015

Sekaiichi Hatsukoi Vol.5 Ch.5 : Vol 05The Case of Yoshino Chiaki vol 1

Feb 19, 2015

Sekaiichi Hatsukoi Vol.5 Ch.4.6 : Vol 05Extra

Feb 19, 2015

Sekaiichi Hatsukoi Vol.5 Ch.4.5 : Vol 05The Case of Kisa Shouta vol 4.5

Feb 19, 2015

Sekaiichi Hatsukoi Vol.5 Ch.3 : Vol 05The Case of Onodera Ritsu vol 9

Feb 19, 2015

Sekaiichi Hatsukoi Vol.5 Ch.2 : Vol 05The Case of Onodera Ritsu vol 8

Feb 19, 2015

Sekaiichi Hatsukoi Vol.5 Ch.1 : Vol 05The Case of Kisa Shoutai vol 4

Feb 19, 2015

Sekaiichi Hatsukoi Vol.4 Ch.4 : Vol 04The Case of Kisa Shouta vol 3

Feb 19, 2015

Sekaiichi Hatsukoi Vol.4 Ch.3 : Vol 04The Case of Onodera Ritsu vol 7.5

Feb 19, 2015

Sekaiichi Hatsukoi Vol.4 Ch.2 : Vol 04The Case of Onodera Ritsu vol 7

Feb 19, 2015

Sekaiichi Hatsukoi Vol.4 Ch.1 : Vol 04The Case of Onodera Ritsu vol 6

Feb 19, 2015

Sekaiichi Hatsukoi Vol.3 Ch.4 : Vol 03The Case of Kisa Shouta vol 2

Feb 19, 2015

Sekaiichi Hatsukoi Vol.3 Ch.3 : Vol 03The Case of Kisa Shouta vol 1

Feb 19, 2015

Sekaiichi Hatsukoi Vol.3 Ch.2 : Vol 03The Case of Onodera Ritsu vol 5

Feb 19, 2015

Sekaiichi Hatsukoi Vol.3 Ch.1 : Vol 03The Case of Onodera Ritsu vol 4.5

Feb 19, 2015

Sekaiichi Hatsukoi Vol.2 Ch.4 : Vol 02The Case of Onodera Ritsu vol 4

Feb 19, 2015

Sekaiichi Hatsukoi Vol.2 Ch.3 : Vol 02The Case of Onodera Ritsu vol 3 part 2

Feb 19, 2015

Sekaiichi Hatsukoi Vol.2 Ch.2 : Vol 02The Case of Onodera Ritsu vol 3 part 1

Feb 19, 2015

Sekaiichi Hatsukoi Vol.2 Ch.1 : Vol 02The Case of Onodera Ritsu vol 2.5

Feb 19, 2015

Sekaiichi Hatsukoi Vol.1 Ch.4 : Vol 01The Case of Onodera Ritsu vol 2 part 2

Feb 19, 2015

Sekaiichi Hatsukoi Vol.1 Ch.3 : Vol 01The Case of Onodera Ritsu vol 2 part 1

Feb 19, 2015

Sekaiichi Hatsukoi Vol.1 Ch.2 : Vol 01The Case of Onodera Ritsu vol 1 part 2

Feb 19, 2015

Sekaiichi Hatsukoi Vol.1 Ch.1 : Vol 01The Case of Onodera Ritsu vol 1 part 1

Feb 19, 2015
...
click to show all of the chapters
Total: Sort by: Popularity / Date
2014-08-02 01:54
163Agree
I love the manga way more than the anime. Reason being, the amount of sexiness.
2014-08-02 10:02
94Agree
How can you not fall for this sweet story? Once you start reading, you get addicted. So much love, everyone wants it ~
2014-09-08 16:34
57Agree
Masterpice
2014-08-02 01:05
46Agree
Im not surptised! Its one of Nakamura Shungiku works! That is all I have to say and to me that is a lot. :)

1769 Topics

  1. zakeya May 25, 2015 4:30 pm

    Hi guys!! Which stanza do you think fits the relationship between the nostalgia, domestica, and erotica pair? As you can see I also post this in JR page (for those who also read JR), it's just that I don't know what to do so... by the way here's the poem:

    Love is a feeling
    In which someone expresses by caring
    Caring for someone deeply
    When you love someone truly

    Love has various reasons
    Reasons that can not be explained
    For when you love, you don't need reasons
    Because love is inevitable

    Love may be express through emotions
    Emotions that shows actions
    Actions to be proven in motion
    For as someone loves, words are not enough

    When you love, you'll experience pain
    Pain that demands to be felt
    Once you feel the pain
    You'll be miserable in vain

    • zakeya May 25, 2015 4:37 pm

      Also, why do you think that stanza fits or is most likely to describe their relationship?

  2. Kurenai May 22, 2015 10:01 pm

    I don't know who it is, but whoever is reposting Daletos's uploads need to credit him or we won't be getting anymore translations in the future Dx. And it is still kinda plagiarizing if you just crop out his text and put your own text ><...Daletos's and his team had to do the the cleaning/etc!!!

  3. loli May 22, 2015 12:49 pm

    Hi guys, can I ask what is your favorite moment in SIH? Be it the nostalgia, erotica or domestica pair. Mine is when onodera stops takano from going to.yokozawa-san, the super lovey dovey chapter etc. (Ughh it's so many I can't even choose :3) so what's yours?

    • Akashi's Queen
      May 22, 2015 1:40 pm

      I think the young moments of Onodera and Takano are the sweetest...

    • yaoi is life and i portect thi
      May 22, 2015 3:20 pm

      my favorite moment was when takano and onodera was standing in the rain and onodera screamed:"I Love You" (≧∀≦)

    • Zamu
      May 23, 2015 7:38 am

      One of my fave is when Takano says "then just reject me completely, let me get over you completely" Onodera's reaction to this was beautiful!

    • JR & SIH fanatic
      May 23, 2015 1:45 pm

      My fave moments are: 1. "The Case of Takano Masamune #1"- I really love this chap especially the last part where takano says that onodera weren't the 1st person he dated but he was his FIRST LOVE...kyaa :) 2. "The Case of Onodera Ritsu #15"- one of my fave also because takano said that "I am scared to death..of never being able to see you again." to onodera then later hugs him. :) 3."The Case of onodera Ritsu #13" - ritsu's birthday. And then all of the chapters where takano hugs ritsu like he's someone precious and just like Zamu said I also love and is also one of my fave the chap. where takano says to ritsu to reject him completely so that he will get over him completely and yeah onodera's reaction was really beautiful. Lastly, the chap. where ritsu stopped takano from going to yokozawa's place because for me he's kinda jealous. :D

    • human_collector May 23, 2015 7:52 pm

      I loved the chapter where Onodera collapsed from exhaustion and malnutrition and Takano scolded him. Onodera had a 'omg I'm so dead' face for the entirety of it and it was hilarious.

    • Anonymous May 24, 2015 1:38 am

      I have 3 fav moments.

      1.When their in the rain and Ritsu screamed I love you but the thunder got in the way. ( I was like Oh you can't be serious!)

      2. Ritsu tells Takano they can't keep having this sex friend relationship and Takano says well just admit you love me. And Takano says he wants to be super lovely dovey with him. Ritsu's reaction was priceless.

      3. Ritsu tells Takano that his engagement to An is over. Takano hugs him tells him he's so happy cause he was scared Ritsu would really marry her. This moment is my all time fav cause it shows how much Takano really loves him. And I thought it was the perfect moment for Ritsu to say I love you. Oh well hopefully it will be soon.

    • Anonymous May 26, 2015 8:25 am
      I loved the chapter where Onodera collapsed from exhaustion and malnutrition and Takano scolded him. Onodera had a 'omg I'm so dead' face for the entirety of it and it was hilarious. human_collector

      i've reread that part many times!!!!!!!! Because ive got a thing for im-sick-but-idk-so-i-collapsed-and-made-you-worry kind of scenes tho!!!!!!

    • human_collector May 26, 2015 12:26 pm
      i've reread that part many times!!!!!!!! Because ive got a thing for im-sick-but-idk-so-i-collapsed-and-made-you-worry kind of scenes tho!!!!!! @Anonymous

      Omg me too. I could just imagine Takano freaking out, and not leaving Onodera's side the entire ride to the hospital. I just love worried Takano.

  4. awww May 21, 2015 7:29 pm

    Re-reading everything and I remember how mad I was at Yokozawa now he's like my no.1 favorite character along with Kirishima. XD

    • Anonymous May 22, 2015 11:08 am

      Me too!!! Their pairing give me life

  5. JR & SIH fanatic
    May 21, 2015 2:22 pm

    Does anyone know the chapter where onodera stops takano from going to yokozawa- san's place? And does haitani really loved onodera or was he just using him to get revenge or he wants him to be angry or what??

  6. VikyHikari
    May 20, 2015 8:55 pm

    I want thay ring<3 And the hoodie too!!

  7. JR & SIH fanatic
    May 20, 2015 5:43 pm

    What do you think will happen in "The Case of Onodera Ritsu vol. 21?" Any thoughts? I'm very curios. :))

    • Here May 20, 2015 6:04 pm

      Takano will confess how much he loves Onodera, Onodera will reject, Onodera will think it over, Onodera will accept he loves Takano but can't say it, Takano will force Onodera to confess, Onodera will start to mush up and ask Takano to listen, Takano takes off clothes and proceed with sex, next day: Takano does sth to annoy Onodera, queue: I will never fall in love with you!!!! queue: 126463856 fucking years till Onodera falls in love.

    • JR & SIH fanatic
      May 21, 2015 3:15 am
      Takano will confess how much he loves Onodera, Onodera will reject, Onodera will think it over, Onodera will accept he loves Takano but can't say it, Takano will force Onodera to confess, Onodera will start to ... @Here

      Wow some of your thoughts are the same as mine. :) And I love what you said at the last part "126463856 fucking years till onodera falls in love" it made me laugh :)) and thank you for your comment. :))

    • Miss.Snickers May 24, 2015 6:16 pm
      Takano will confess how much he loves Onodera, Onodera will reject, Onodera will think it over, Onodera will accept he loves Takano but can't say it, Takano will force Onodera to confess, Onodera will start to ... @Here

      TRUEEEEEEEEEE

  8. Anonymous May 20, 2015 5:34 am

    Dammit! I want a rabbit eared hoodie!!! *stomping foot*

  9. ughhh May 19, 2015 6:36 am

    The art's no longer the same ughhh annoying.. And the letters why is it so big ughh. Sorry to be rude ughhh

    • IrisOfTheMoon May 19, 2015 6:43 am

      For an artist, it is hard NOT to undergo change in art style. I like both styles of the mangaka.
      The word font was a little too big wasn't it? It might have been an error made by the translators or something.

    • ArctosLunam
      May 20, 2015 1:49 am
      For an artist, it is hard NOT to undergo change in art style. I like both styles of the mangaka.The word font was a little too big wasn't it? It might have been an error made by the translators or something. IrisOfTheMoon

      i agree I love both styles, because either way it's still the same story-line and that's what i fell in love with <3(▰˘◡˘▰)

  10. teri
    May 18, 2015 5:54 pm

    Is it just me or did the style change? Is there something wrong with my eyes?

    • Anonymous May 18, 2015 7:32 pm

      It did change. I thought I was the only one. It's not super detailed anymore and where most of the older males or the seme's had squarish china now they don't. And the eyes too... It's weird. I wonder why she changed it.

    • Anonymous May 18, 2015 7:33 pm
      It did change. I thought I was the only one. It's not super detailed anymore and where most of the older males or the seme's had squarish china now they don't. And the eyes too... It's weird. I wonder why she c... @Anonymous

      Hahaha autocorrect. Aish. I meant chins*

    • Louise
      May 18, 2015 10:41 pm
      Hahaha autocorrect. Aish. I meant chins* @Anonymous

      She changed it because her editor told her to do so. I really prefer her new art, I think it is very lovely (⌒▽⌒)
      Her former art was to rough and not that nice (That is my personal opinion).

  11. Anonymous May 18, 2015 4:33 pm

    (╯°Д °)╯╧╧
    WHAT HAPPEND?! Did they took it down? I bookmarked Vol.10 ch.1 page 1, but it send me back here instead! *grrrr* If I knew this would happen I should had read it sooner, but didn't had time 4 it

    • Anonymous May 18, 2015 8:44 pm

      It was a re-post so you didn't miss anything OwO but dang do I want an update O-O

    • Anonymous May 18, 2015 9:33 pm
      It was a re-post so you didn't miss anything OwO but dang do I want an update O-O @Anonymous

      IC, that's good then. But still: I WANT AN UPDATE (๑•ㅂ•)و✧ Guess have to wait longer then ╮( ̄▽ ̄)╭ Hope next time they re-check before posting. (〜 ̄△ ̄)〜 Don't think I can take another false hope. ┗( T﹏T )┛

    • vampireguilty
      May 18, 2015 10:29 pm

      i read on mangahere.co that the vol 10 ch 1 release was actually the same as vol 8 ch 11....so we would have been disappointed anyway.... :-/

  12. Anonymous May 18, 2015 3:07 pm

    urg Takano annoys me so much right now. Onodera is finally starting to open up and think things over and Takano just can't give him a minute to talk, he just forces him again to fuck. :/ Sometimes I wonder why Onodera bothers anymore, Takano's sexdrive is above his head.

    • ZoLu May 20, 2015 2:29 am

      I guess Takano is just afraid of what will come out of Onodera's mouth...because he could be unpredictable sometimes but i totally agree about his sex drive like damn son! Sooner or later Ritsu will need to wear stopper.

  13. Miss.Snickers May 18, 2015 2:56 pm

    (ノಥДಥ)ノ︵┻━┻・

  14. Demon May 18, 2015 1:32 pm

    i was reading the new chapter & booom it's GONE!!! WTF!!!
    I WANT IT BACK NOW (╯°Д °)╯╧╧

  15. Yuki26
    May 18, 2015 12:20 pm

    Booo! it's not an update. It's just "vol 8 chap 11" with different name ┑( ̄Д  ̄)┍

  16. mizuki May 18, 2015 12:06 pm

    Sooo, Ritsu is finally giving his first blow-job and what does Tanaka do? He gags him by forcing him to deep throat. It lacks a certain finesse and felt a bit ... brutish. If only sensei could get her gay sex material the same place that made Punch Up and so many other yaoi mangas so frigging hot.

    Can you imagine if Tanaka started rimming Ritsu?!! *faints*

  17. andreery
    May 18, 2015 11:26 am

    IT'S THE SAME AS THE ONE I READ IN FEBRUARY!!

  18. Stormborn
    May 18, 2015 11:16 am

    Guys... still thanks, but it's the same thing. Vol 8 Ch. 11 & Vol. 10 Ch. 1 :(( we already read the "new" thing in February :(

  19. Stormborn
    May 18, 2015 10:51 am

    A new chapter?!?! Best thing that can possibly happen today ;p thanks a lot translators, thanks thanks thanks BIG TIME!!!

  20. Meicchi May 18, 2015 9:57 am

    I'm getting sort of fed up with ritsu right now, can he just move on from the past and confront his real feelings to takano? I know that takano hurt him but with ritsu running away from all his problem and being so wishy washy is starting to piss me off. Takano is trying really hard to make up to the past and being honest with his feelings, like give takano a break ritsu and just confess. This dragging way too long (╯°Д °)╯╧╧

    • Yoru-San May 18, 2015 11:48 am

      He already did... Can't you see he tried to say to haitani that he's already in love with takano?? Takano just went and interrupted ritsu...
      Can't you see that he wants to know more of takano and got jealous...

    • Meicchi May 18, 2015 12:10 pm
      He already did... Can't you see he tried to say to haitani that he's already in love with takano?? Takano just went and interrupted ritsu... Can't you see that he wants to know more of takano and got jealous... @Yoru-San

      okay I get that part but what pisses me off was he didn't say it afterwards...it's like he remained quiet without confronting takano his feelings outright. It just feels like everything is being dragged on again.