I'm waiting for the tragedy. Right now the story is him getting pushed around by the people around him, that are ignorant of him being sick, and him trying to redeem himself in Sayane's eyes. Because of how Sayane treats him, he believes he is the lowest of the lowest. And he doesn't want to tell anyone about his sickness. Up until now I understand everything. What I don't really understand is his mother's behavior, but that might be explained later. Let's see how it develops.