STARS-549 Four years spent having an affair with a coach who has a wife and child! A track and field girl who aims to be the best in the world...

Oki appears as a new coach in the track and field club of a certain private university. - Oki was a demonic coach who imposed tough practices. - Although the club members were dissatisfied with Oki, they had no choice but to obey him. - Meanwhile, Oki becomes passionate about teaching Yuii, who practices harder than anyone else. - The relationship of trust between the two eventually develops into romantic feelings. - Aiming to conquer the nation, the two of them train together...