STARS-549 Four years of adultery with a married devil coach! The track and field team girls aiming for world number one and forbidden fleshly copulation. Mahiro Yukii

Oki appears as a new coach for the track and field club of a certain private university. Oki was a demon coach who imposes strict training. The club members had no choice but to obey such a large tree, even though they were dissatisfied. Meanwhile, Oki is enthusiastic about teaching Yui, who practices more than anyone else. The relationship of trust between the two eventually develops into a romantic relationship. Aiming for national domination, while doing special training with a three-legged team ….