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

A new coach, Ooki, appeared in the track and field club of a certain private university. Ooki was a strict, demonic coach. Although the team members were dissatisfied with Ooki, they had no choice but to obey. Among them, Yuui trained harder than anyone else, igniting Ooki's passion for coaching him. Their relationship of trust gradually developed into romantic feelings. As they aimed for national dominance and trained together…