Ok so we find out that the Mc’s BFF died in a motorcycle accident so he ends up taking care of his little brother (they were orphans). Sumi knows that hibari likes him but doesn’t feel right to respond to his feelings. In the end he can’t stop himself and we learn that Hibari was also feeling guilty about his bros (misagi’s death) but they work through it after Hibari gets scared when sumi collapses of dehydration and ends up in the hospital with a bleeding head. They end up staying together even after Hibari graduates. The end.
Nakanai Hibari