Animenewsnetwork - I never thought I'd say this, but Kosei Arima has a selfish streak. It was excusable before, when he was struggling to make his own life after defining it around his mom's wishes. He decided to make Kaori his "person he played for," and seemed at ease with that. Kosei still has the ghost of his mother defining music for him though. He hasn't shaken his problem with "hearing the notes" at all. In fact, he enjoys and relies on it, and falls apart when Nagi's concert throws off this skill. Kosei nearly sabotages everything, taking over Nagi's part as well. This leaves the audience gasping at Kosei "having his way with her" (Hiroko's words).