Karamatsu

Hey, i got you! I have a lot of recommendations with the synopsis ^_^.
Straight

Magnet na Watashitachi - Tsumugi has a niece who goes to kindergarten. For various reasons, many times it's up to Tsumugi to pick her up after school. One day, just outside the entrance she notices her own classmate, Uchimura-kun, who appears to be acting suspiciously! At school he is disliked by all and has no friends, but apparently behind his behavior hides an unbelievable truth...

Tonari no Kaibutsu-kun -Shizuku Mizutani is a so-called "study bug" who cares little about her classmates and instead strives to become a successful working person like her mother. However, her world changes when she is bribed into bringing notes to the class delinquent, Haru Yoshida, who had quit school after a violent fight got him suspended.

Despite his abrasive introduction, Haru soon becomes convinced that they are friends, even going as far as confessing his love for her. As she spends more time with Haru, Shizuku learns that beneath his rough exterior he has a kind and honest spirit.

Atashi no Bambi - Haruko Nanase wasn't always the brightest student, but through sheer hard work she successfully entered a prestigious high school and is at the top of her class. While riding the train one day, she witnesses a fight involving a guy wearing the same uniform as her. When the fight is over, he demands that she pay him a fee for watching it but she escapes. The escape is not to last though, because the next day the guy turns out to be in the same class, and worse, his seat is next to hers.

Ichijou Karen wa Yuuwaku suru - Karen is head over heels in love with her childhood friend, the brusque and fierce-looking Mii-kun. Day after day, she makes amorous advances toward him in hopes of making him her future husband. But when it's just the two of them, she can't help but feel a little nervous...? She's a headstrong queen in front of everyone else, but when faced with the boy she likes, she can't help but turn back into a blushing schoolgirl?! A youthful love comedy that will make your heart pound!

Yamaguchi-kun wa Warukunai - Shy Satsuki Shinohara's plan for a big high school debut are almost ruined by a pervert on the train, but she's saved by none other than the "gangster" student in her class, Yamaguchi-kun. He's already got a bad rap with the other students, and though Satsuki tries to approach him, he seems to always weasel out of her grasp. But she's not one to let a challenge daunt her, and she's out to prove that Yamaguchi-kun is so much more than he's cracked up to be.

Yankee-kun to Hakujou Girl - High school dropout Morio Kurokawa is an infamous delinquent known as "Morio the Black Panther," who has won many fights against others older than him. Walking through town with his posse, he comes across Yukiko Akaza, a girl with extremely poor vision due to a condition affecting her eyesight. Refusing to be intimidated by him, Yukiko encounters Morio time and time again, which causes him to fall deeply in love with her. Morio's urge to protect her grows every time they meet, and he begins to learn more about the hurdles Yukiko faces on a daily basis.

Megane, Tokidoki, Yankee-kun - In middle school, Hiro Momose was bullied and forced to be an errand girl for delinquents. Now a high school freshman, she is hoping to turn over a new leaf. Although the requirement states that each student must join a club, the clumsy Hiro is rejected by every club she has visited. Because of this, she ends up joining the "Helper's Club," a group on the verge of disbanding with Dan Ichikura as its sole member.

On the surface, Ichikura seems like the perfect boy—boasting good grades, athleticism, and a reliable nature. However, he harbors a secret that hits a bit too close to home for Hiro: he was once a delinquent. When she finds out, Ichikura swears her to secrecy. Now, Hiro must avoid returning to her middle school days and make this chance encounter work out for them both.

BL

Abarenbo Honey -
Teenage delinquent Takuma Moriyama is an omega who loves bears and enjoys getting into fights. He doesn't have time to bother with taking his heat suppressing medicine since he's too busy brawling in the streets, and his carelessness eventually catches up to him when he goes into heat - right in the middle of a fight! Even worse, his opponent is his archrival Hachi, the alpha son and heir of a powerful yakuza family. But when their pheromone-driven passion subsides, both boys must deal with the aftermath. Will these rivals-turned-mates actually manage to fall in love without killing each other? And what happens when Hachi's family objects to the match?

Caramel Honey -
Ayato transfers into a new school, hoping for a fresh start. Sadly for him, the school turns up to be filled with deliquents, and the most feared of them all has his eye set on him. And it doesn't help, that whenever Ayato accidentally takes off his glasses, everyone around him suddenly becomes completely smitten by him.

Double Face ni wa Kanawanai - Could the ideal guy be his arch-enemy? Kaname Ando is a high school student who's always dreamed about being a tough guy, though it's about all he can do to snipe at his goody-two-shoes classmate, Katagiri. One day, He is sulking on his way home from school when students from another school pick a fight with him. To his delight, a tough guy named Soma suddenly appears on the scene and saves the day. He's overjoyed, telling Soma he'd been looking for a friend like him, when Soma suddenly kisses him...!! Ando is already feeling dizzy when he discovers that Soma and his boring classmate Katagiri are one and the same. A story about a weakling badass and a "straight A" student who turns bad after school.

Megumi to Tsugumi - In an alternate universe, everyone has a secondary gender: alpha, beta, or omega. From these, there is a natural hierarchy. Alphas are at the top, while omegas are at the bottom due to their lack of control over releasing pheromones that can dangerously attract other genders, especially alphas.

Megumi Kokonoe is an elite alpha. However, his behavior is reflective of little other than juvenile delinquency. When his subordinates are attacked by a masked man, Megumi does what any good leader would do—he sets out for revenge. Despite the mysterious man's ability to take down the alpha students of Kokonoe Academy, Tsugumi Yamada, an omega, shows up to the confrontation absolutely reeking of pheromones. It turns out that unlike other omegas, Tsugumi rejects the use of suppressants and controls his heat with only his willpower.

Believing all alphas view omegas as nothing more than tools for reproduction, he holds an intense hatred for them. When Megumi makes it extremely clear he does not feel that way—and confesses feelings that Tsugumi does not understand—Tsugumi starts to doubt the strength of his willpower alone.

Kaniteki Pervert Romance - A lone wolf with a delinquent streak, Kashima enters high school with a reputation that scares off his classmates. Little do his classmates know, Kashima is not a typical delinquent: he is a masochist that enjoys being hit by guys. Ryouji Sanada, despite Kashima's reputation, goes out of his way to talk to Kashima on the first day of high school. Confused by Ryouji, Kashima rebuffs his handsome classmate. But, when Ryouji intervenes in one of Kashima's fights (and attempts to get off), Kashima realizes that Ryouji might just have a secret "perversion" too...

Nakaseteyaru yo Yankee-kun - The boys' school's hard-core charismatic Yankee Kou is a childhood friend and best friend of the little but handsome Yankee Maki. Kou, who was told by Maki that he wouldn't be able to meet him again after graduating because he got a job in Tokyo, expresses his feelings for Maki, who has been patient since he was little. The two of them confirm each other's feelings in the wake of Kou's confession, but when Kou takes responsibility and wants to get married, he approaches Maki!?

Outsider Communication - Among their high school peers, Seki and Iwashiro are both outliers—yet share no similarities. Sporting dyed blonde unkempt hair and multiple ear piercings, Seki is the school board's natural enemy. One day, while he is skipping class with his friends, he drops a lewd magazine in a collision with the straight-laced Iwashiro. The living embodiment of a model student, Iwashiro immediately disposes of the magazine, only furthering his image as a cold and unreadable "alien," as his classmates call him behind his back.

Despite Seki's wishes to steer clear of the strange boy, they continue to cross paths—which leads to Seki accidentally pushing Iwashiro down the staircase. Despite spraining his ankle in the fall, Iwashiro decides to let Seki go without reporting him under one condition: he must come to Iwashiro's aid whenever he needs help carrying anything.

Although initially annoyed by his newfound responsibility, Seki comes to Iwashiro's side without fail each time. As the two develop a mutual understanding and appreciation of what makes them so different, a budding relationship forms between the two outsiders.

Spoon ga Magattara - Tomoki Hoshiko is a troubled student who others steer clear of. Hidaka Asai, on the other hand, is the top student in the school, but his quiet bookishness hasn't made him any friends, either... After the two of them get teleported away from school by accident, Hidaka confesses that he has powers to Tomoki. Why did he tell him his secret? Maybe Hidaka is the only one who knows Tomoki's true nature.

I've been looking in my list but i have no GL, apologies. But hope you enjoy these recommendations!

I ONLY HAVE A FEW AND IDK IF IT FITS THE DESCRIPTION OR IT'S SOMETHING YOU'D LIKE

https://www.mangago.me/read-manga/aioi_focus/

https://www.mangago.me/read-manga/tadatada_suki_to_iu_dake_de/

https://www.mangago.me/read-manga/megumi_and_tsugumi/

https://www.mangago.me/read-manga/nirameba_koi/

(Not really delinquent but perceived/misunderstood to be one?)
https://www.mangago.me/read-manga/you_re_my_princess/

wow thank you, ill check them out ^^

TY!! ill check them out!!

chikku bingo

Dark heaven
Make me bark
Junai drop out
Feeding lamb
Kiseki to Amedama
Yasashii Anata...
http://www.mangago.me/read-manga/namae_mo_shiranai_machiawase/

Berserk

Try Solo Leveling if you haven't already.
http://www.mangago.me/read-manga/solo_leveling/

My current favourite in Yaoi is Usagi No Mori,
http://www.mangago.me/read-manga/usagi_no_mori/

Probably Vagabond. Oooo, but Magi is also great, although I haven't finished reading it.

Try and check out this manga. It has a great wholesome genre, with school life set up. The art is great as well
http://www.mangago.me/read-manga/kono_oto_tomare/
Been obsessed with this since I found it few month ago.

The art in Vagabond is breathtaking.

Yeah. Shame it's on eternal hiatus