Teacher x Student relationship

High school art teacher Jun Usami has loved his best friend, Ryuuta, since they were high school students. Unbeknownst to Jun, Ryuuta's younger brother, Takumi Kajiwara, has been in love with Jun since he caught Jun stealing a kiss from his sleeping brother. As fate has it, Takumi has grown into the exact image of Ryuuta. Now that Takumi is a high-schooler and Jun's student, it's the perfect chance for Takumi to get close to his 'Usa-nii'.

The wheels of fate begin to move in Takumi's favor when

Kuroe is annoyed by his always-smiling teacher, Mizushiro. "So you treat all your students equally? So annoying!" Kuroe passes his boiling point and decides to take action in this ardent and thrilling school romance.

Shino has quite a crush on his cute tutor Akio. Akio promises Shino a reward if he can do well on his mock exams but what kind of reward is the student expecting? Will the tutor be forced to pay up?

1) The Princess is Mine- So the rumors are true - Himemiya does have sex with boys. After seeing it first hand, what will Takayuki do? Obviously taking a shower is the correct answer, especially when you are not alone.
2) Love Science- Hikari is shocked when chemistry sensei Touchi confesses to him. He turns him down flat, but Touchi doesn't give up so easily. With robots and strange inventions to help him out, will the stalker/sensei get his guy?
3) Love is the Best Present from You- Student co

Takatsuki thought that Suou sensei was the only one who was compatible with a top student like him. Takatsuki refused to accept Suou’s rejection and insisted staying over at his house to be his slave. However, Suou asked him to leave because Takatsuki couldn’t strike a balance between schoolwork and doing his slavery duties. What should he do to get Suou to look at him?

Chapters: 1-5 Plus Extra (Chapter 6)
Chapter 1-5 and Extra: Is mainly the main story of this series.
This is about a teacher, Fujiki Tomo, whose class has a new student who is as cute as an angel: Shiina Kazunari.

From bl-gyaru:
Niia is a good student who always has top grade of the class. One day, his teacher found out that he’s smoker so to received recommendation letter from school, he’s willing to do anything for his teacher.

A math teacher who has an intense relationship with the problem student, Kikusui Kiyoya. Even though they were a couple in love, one day, Sensei suddenly wants to break up...? The discontinued book by Hana Umezawa, her first BL work re-released. -