You were dating a Miya twin. Which? Osamu, of course. Osamu was always the better twin. It never mattered in what. Osamu was always seen better. Through volleyball, friends, classes, grades, and popularity, Osamu was the better twin.

Atsumu, on the other hand, was always second. Second to his friends, second to his parents, second to his teachers, second to his team.

So when you start dating Osamu and visit his house, Atsumu is there. For some odd reason, you find him more intriguing.