Toji Seryo is a popular first year high school student. It's well known that Toji Seryo will date anyone that confesses their affection for him on a Monday, but he will break up with that person by Sunday. Yuzuru Shino is a third year student at the same high school. He looks pretty, but all of his former girlfriends end up dumping him. Yuzuru Shino becomes curious about Toji Seryo. On a whim, half serious & half joking, Yuzuru Shino asks Toji Seryo to date.
Yuzuru asked Touji out as a half-hearted joke, not expecting to be taken seriously. Touji accepted, and Yuzuru knew he was like the rest, the relationship begins on a Monday and ends on Sunday. What he did not expect was the feelings that went beyond friendship that emerged. It's now Friday, and the end is approaching. But is it? Yuzuru may be mourning the inevitable, but what about Touji? Friday begins the end, but Sunday reveals all.
A high school girl finally gets her own apartment, but she has to share it with the most popular boy in school. No one can know they're living together.
