A hot-blooded anime on the topic of e-sports based on the real Chinese online game 300 Da Zuozhan (300 Heroes). Former top professional gamer Aoba Kaito returns to the gaming circle to regain his professional qualification which was deprived due to a doping suspicion. He and his friends confront against the conspiracy and rise to the top of the leaderboards.

The story centers around an illness-stricken, constantly bullied orphan girl named Minori. After one rainy day, she doesn't turn up at school, having been admitted into a hospital in a distant town. Two months pass, and the girl's two school friends, Takashi and Kyouko, receive a mysterious email with no sender listed. The email reveals a summer festival taking place at a nearby town... (Source: ANN)