Rintarou is bothered by the throbbing of his heart caused by his tutor, Kaede for unknown reasons. One day, Rintarou finds out that he's actually in love with Kaede when he was receiving H punishment! But, without knowing Kaede's feelings, Rintarou became anxious and--?! Little sadistic home tutor x natural high school student's afterclass love..
Related to: Koitomo!?
https://mangapark.me/manga/koi-tomo
* MangaPark link since the translation is much better.
Ever since his mother passed away, Hinata has been taken care of by Midori, who is as strict as he is caring. Midori’s smart, and tall, and handsome. He also doesn’t have a shadow or a reflection in the mirror. Wait… What? Hinata’s a scaredy-cat, and thinks Midori might be a ghost. But he is in fact a…?
Takahashi Misaki is suddenly having some unexpected and odd problems. What started as a need for some college entrance exam tutoring has somehow led him to being romanced by a suave older man who also happens to be his big brother’s best friend. Confused by all of his brand new emotions, Misaki struggles to deal with his suddenly very odd life.
Related to: Junjou Mistake, Sekaiichi Hatsukoi
17-year-old Kaidou Haru spends the summer with his mother in Canada, where he meets 8-year-old Ren, his newly adopted brother. At first Ren is wild and won't listen to anything Haru says, but the two soon grow close and Haru asks Ren to come live with him when he gets older.
Ryou's parents got separated when he was just a little child. The last time he saw his father was just like looking at an older brother. He has been living with his mother since then, but the time has come to visit his old man. Surprised at first that he still looks very young, Ryou starts to think a lot about the past. But what will happen to him when time tricks him and he gets to live in the past?
High school student Kyuta's second cousin is Etsuro, a calligraphy teacher and womanizer who for some reason sexually harasses him as well. One day though Etsuro gets injured while protecting Kyuta, so Kyuta comes to live with and take care of his cousin until the injury heals. Will a closer relationship develop between Kyuta and that “good-for-nothing” Etsuro?
Related to: Kono Ore ga Omae Nanka Suki na Wakenai
Hardworking, good-looking, and heir to daddy's company, Shimano thinks his life's just about perfect. Except that he's working from the bottom of the company, and he can't seem to get along with Kurosawa, his manager. Competent but flippant, Kurosawa always seems to pay extra attention to Shimano, whether it's teasing him to make him work harder or covering up for his mistakes...
Doushiyoumo Extra - Tight Rope (Ch 5)
http://www.mangago.me/read-manga/tight_rope/
Ch 1-2) Yamada runs away from home and goes to hang out at the school until things cool down. Unfortunately he runs into his homeroom teacher who takes him home.
Ch 3-5) Ikeda moves into his dormitory to find out his room mate Kazuma has a terrible personality.
Salary man Saki almost makes it home but passes out from fever just as college student Shinomiya passes by. When Saki comes to he realizes he's in a strange apartment and Shinomiya has been taking care of him for the past two days! Not wanting to be indebted, Saki tries to repay him as thanks but Shinomiya's having nothing of it. Luckily, Saki's pretty creative when coming up with a way to express his gratitude that has them both wanting more...
Shirou wants nothing more than to pet a fluffy rabbit, but his cold and stern expression betrays him and he's never had the chance. So when he finally gets his chance to hold one such fluffy rabbit, you think he'd finally be content, though now it seems his attention has been caught by the young struggling uni-student Kou. He's cute just like a rabbit, but he's not a rabbit, so then what is this feeling?
Katekyo!