Yuuma Jinnai is Akari's crush and in school, in fact he is in the same class as she does. He's calm, nice and somehow helps Akari out in a pinch. His parents died a long time ago, now living with his grandparents. He also likes basketball, which in Episode 17, he's part of the school's basketball team. There are a few speculations that he could be the mysterious guy watching over Akari, but proven they were both different people.

(Source: Wikipedia)