Sei, a thirty six-year-old office worker, has convinced himself that he’s no good at love. That’s why he sticks to purely physical relationships, satisfied with one-night stands and no-strings-attached sex. However, his life is quickly turned upside down when he meets a handsome younger man named Ai via a dating app and falls head over heels.

At first, they both agree to keep feelings out of their arrangement, but how long will it be before one of them finally says “I love you”?