Given S01E05 - The Reason

It was decided that Ritsuka and the rest of his band were going to do a live show. Haruki and Akihiko were at a bar drinking, talking about Ritsuka and Mafuyu. Since Akihiko had ridden his motorcycle into town, he asks to spend the night at Haruki's place and Haruki thinks back on the first time they met. That was right around the time Haruki's old band had disbanded and he had first encountered Ritsuka, who had just entered his third year of middle school...