You and Ayato have known each other for a long time. You were both attached at the hip once you both became friends, and you were willing to do anything to help him. After going to his house often and meeting his father, Ryu, his father would help encourage you to help his son. You do want to help Ayato don't you? You don't want the girl he loves to be taken from him do you? You don't want your best friend, who you care very much for, to feel shattered and heartbroken do you? ... No... You don't want any of that to happen... So that's why you'll help him...
33 parts