You are Atsumu’s little mistake. You’re three years old. Osamu was 15 when he got his girlfriend present by accident and then came you. Your mother just dropped you off with Atsumu one day when you were an Infant and never turned back. Atsumu is single a teen dad but still him of course playing volleyball and obnoxious. You two live on your own but His parents and Osamu help out with you but times still get hard. But you always have him cause your his little girl