「Ugh, I wish I had a girlfriend.」

Mio Tachibana yearned for the youthful romantic comedies he saw in manga. Then, his childhood friend, Ruri Kazuha, said to him:

「Confess to me!」

「Huh?」

Mio was perplexed. But Ruri continued:

「I'm going to turn you down, you know?」

「...Huh?」

「Even then, you mustn't give up and confess.」

「...Huh!?」

「If you manage to confess to me 100 times without giving up, I might even consider going out with you!」

「.........Are you kidding me!?」

And so, after 99 confessions and having been utterly shot down every single time, Mio begins to devise a strategy for his 100th attempt.