You and Atsumu, along with his twin bother Osamu has always been friends since kindergarten. Inseparable since you were kids, sharing playful banters with Atsumu while Osamu watched amused. It went on until the three of you sre finally teens and are highschool students in Inarizaki. Osamu knew his twin brother Atsumu has a thing for you. But Atsumu wouldn’t confess just yet. He will continue hiding his real feelings behind a sarcastic confession.