After entering high school, Hiyori is finally able to fulfill her dream of living alone. Or so she thought... Her childhood friend Soushi is there waiting for her at her new apartment. He suddenly kisses her and Hiyori is unable to hide her confusion. Is he teasing her? Or is this for real...?

Izuru said he'd stop one second before he kissed Rikka... So why are they really kissing right now!? Rikka's first kiss is on stage performing a play...!

Saya is always alone because she goes straight to the nurse's office when she gets to school. One day, Mutsumi, the reason why she stays there all day, barges in. He slips into the bed she's sleeping in, telling her to help him hide from the teacher who's chasing him, and kisses her to keep her mouth shut.

The boy who suddenly appeared before Rin is her fiance!? But his true form is that of a man-eating demon... Rin's parents passed away when she was little and she has been living with her brother ever since. One day, she meets a transfer student, Suo Kusa. He kisses the birthmark on her neck as he exclaims "I finally found you...!"

Just before her senior year of high school, Kasumi's father has to transfer to a new workplace, and she is faced with a forced school transfer. When that happens, her homeroom teacher Mr. Sera tells her, "If you really want to stay, then come live with me."

"Will you buy my silence with a kiss?" He sees her naked and asks her for a kiss in return for not telling anyone about it! She doesn't want to...... so why's her heart beating so fast......?

The moment our girls' high school merged with a boys' high school, I lost my title of "school prince" to Yamato Katsuragi, a lazy genius who studied abroad. I just couldn't forgive him, so I challenged him, with the loser becoming the winner's servant.

Aki and Haruto instantly become a couple ten seconds after they first meet. From these two comes an awkward love story. Aki is a girl whose motto is, "If you love them, tell them right away!" On the other hand, Haruto thinks that there are times when you can't just confess your feelings.

Hatoko's getting sick and tired of being pushed around by her childhood friend and professional model, Subaru (a.k.a. The Sadistic Prince). One day Subaru drags her along to... a photo studio!? Filling in for a model, she is forced to play the role of Subaru's girlfriend.

Yuno admired an older guy at school and tried to give him the first cookies she ever made. However, due to a series of misfortunes (?), she somehow made a mistake and ended up saying "Please take my first time!" to Shu, a classmate she hates. On top of this misunderstanding, he accepted her as his girlfriend!!

A friend took me to see a fortune-teller, who then made this shocking declaration! If I meet a boy with a heart-shaped mark on his body today, he will be the one I'll have my first time with! But I don't have a boyfriend, and I've never even talked to my crush in private before...

Some guys and girls get together to play the King's Game, in which all players have to obey the orders of the one who is elected King. Yuri's first challenge is to play the Pocky Game with her popular classmate Kanata! She was planning to stop if he got too close, but suddenly he steals her first kiss!

On my 17th birthday, I accidentally kiss the most popular guy in my class, Ichizou. How could I lose my first kiss to some guy I don't even like!? If only time would go back to before we kissed...... And when I go to school the next day, Ichizou acts as if nothing's happened...... What!? No way! Have I actually... gone back in time......?