Multiple couples

3/10
*** includes drugging and ephebophilia ***
A high schooler is attracted to the infirmary teacher. His classmate warns him that the teacher is dangerous and soon a new student joins their class.

10/10
2 couple story - second couple appear in the second half
Heesu, a 3rd year in high school is in love with his best friend, Chanyoung. He's suddenly known to have great dating advice and his classmate, Seungwon, comes to him for dating advice. Little does Heesu know, Seungwon has ulterior motives.

7.5/10
Multiple stories !!
Main: Amamatsu, a high schooler, gets hit with a ball and wakes up with his school rival, Sen, inside him. He finds out he's in a parallel world.
Side 1: Yuuto Uratsu loves nice voices and finds out that Kazusa Akazuma is said to have an amazing voice.
Side 2: Minoru finds out his best friend, Akichika, has a crush, Yokozono, within their highschool and help him.
Side 3: Karatachi works as a bartender is confessed to by a customer, Yoshiwara. He turns him down.

7.9/10
[Multiple stories]
1. Nenji and Taira are best friends in highschool. Taira likes Nenji and wants to see him horny so he brings porn to school to coerce him. They head back to Taira's house and watch porn until Taira asks Nenji to jerk off together.
2. Nao is in love with his highschool best friend Haruna but Haruna likes a girl, Maeda. Trying to give up his love, Nao pushes Haruna and Maeda to get together.