Let's be close friends together, the three of us ♡. Tatsuya—nicknamed “Tacchan”—is a college student who ends up freeloading at the home of his twin childhood friends, Ritsuka and Futaba. The three of them were close friends, but the twins grew up to be cute, and their feelings of love for Tacchan seem like they're about to run wild!? A slightly lewd and heart-pounding cohabitation romantic comedy ♡.