Mamiya, a fashionable young man making his college debut, gets drunk at a nightclub he is unfamiliar with. He is taken care of by Kiri, a fashionable yin-cat who is used to going to clubs, but somehow Kiri knows about Mamiya's high school days, a time when he was a yin-cat who did not want anyone to know about him.

When Kiri asks Mamiya to become his boyfriend, Mamiya becomes his lover out of a desire not to reveal his past to those around him, but...

This is a new kind of love comedy about two people whose personalities are the complete opposite of each other by day and by night!