"You broke our promise, so I'm breaking up with you". Two people so in love in high school who decided to elope. Fifteen years later, Kusaka suddenly tells Mikuriya that they should break up. But why?! Mikuriya's so devoted to him, loves him so passionately and has never cheated on him. So he's stressing over this promise that he can't remember. It is then that he recalls a secret that he's never told Kusaka.

A cat falls in love with a human who once took care of him. Wanting to stay by the young man's side, he agrees to a deal that would allow him to take human form--except in the eyes of the one he has feelings for! What will become of this love?