Maki is a popular high schooler who also models but he has a secret, he is a virgin. His girlfriend wanted to have sex in the gym storage room but he refused her since they have not dated long enough. After she left he was talking to himself about wanting his first time to be with someone he loved and the person who overheard everything was his classmate, Miyashita. Miyashita suggested that they should date since he was bored for the price of his silence.
As punishment (punishment game), Nagami has to kiss the next person who passes by who turned out to be a man. However, Nagami did not take enough notice in the man he kissed who turned out to be a sempai from the same high school. This sempai (Miyata) knew who he was and jumped him when he went to the infirmary to sleep. He added his name in Nagami's cellphone and blackmailed him to come whenever he calls.
Todo is well liked by everyone but the girls never treat him as a man even if he desperately wants a girlfriend but he wont let it show. He has one problem that he will never share and that problem is his tiny penis. Yamamoto is the gloomy person in the class and even though they have been in the same class for 3 years they don't talk to one another. In the end they were paired up for a group outing where Yamamoto saw his small penis and gave him advice on it, suddenly Yamamoto is Todo's Master.
Two guys meet each other as each of them was walking on the same line on the road. They were each pretending that the line is a path and if they strayed then they will die. Day after day they meet each other until one of the guys started falling in love with the other and kissed him. Not knowing what to do he ran away.
Neo (28) is very upset after getting a wedding invitation from a high school sempai (Maki) who made him the way he is now 10 years ago. On his way to the wedding, Neo was hit by a truck and ended up as a mini version of himself next to his high school self. Here he tells everything to his younger self and wants him to stay away from Maki but things did not work out so well.
Kei is a only child who grew up with his childhood friends (Hibiki and Kanade, brothers) and he sees them as his brothers. Kei always thought that everything Hibiki does is cool but Hibiki is the type who quickly stops things he starts. Kei is in love with Hibiki and hibiki is also in love with Kei.
Hanamoto was called out by a guy he did not know, Furuya from another class. He thought he was getting a confession but instead, Furuya wanted them to become friends. Hanamoto have started to notice that Furuya is nervous around him and wont tell him why.
1 day after Hirito had sex with his girl friend, he found his girlfriend having sex with his best friend, Ryuu. Hirito is not even mad at Ryuu. Ryuu is a ikemen who gets anything but he has a foul mouth and a even fouler personality that does not bother Hirito since he is in love with Ryuu. Hirito decided to sleep with one of Ryuu's girls since it would be like indirect sex with Ryuu (lol).
Kouta loves eating/making food and because of that he is a chubby high schooler. While joking around with his friends, Kouta dumped into a 2nd year who fell over from hunger. Kouta took it upon himself to always prepare food for Shubusawa. However, Sempai really wants to eat (sexually) Kouta.
Darenimo Naisho de.