Tomo and Shuuhei grew up together--when they were younger, Shuuhei had an accident that blinds one of his eyes which tomo blames himself for it. Shuuhei never blamed Tomo and was indifferent. Later, Tomo's mother left him and his older brother. In junior high, Shuuhei cried and asked Tomo not to leave with his brother so Tomo stayed. Shuuhei has always liked Tomo but Tomo thought it was one-sided.
Itsuka Tomodachi Ja Nakunaru To Shite Mo