He appears to be an old friend of Saji and Yuki. He and Saji joined the team at the same time to pick up girls. He once asked Koizumi out, but she rejected him, saying it would just be a waste of time. Because of that, he often gets furious with Saji and tells him to stop acting like Koizumi's boyfriend. He shows up near the end of the anime, trying to get Saji to come to practice, and ends up challenging him to a 3-on-3 basketball game with Koizumi as the prize. Even though Hitachi and his team defeated Saji, Koizumi still rejected Hitachi, leaving him heartbroken again.
No comments