A gym instructor dominates a submissive client on a treadmill.
In a public gym with the possibility of being caught at any moment, a dominant instructor Lav Chang takes physical and dominant control over his young submissive client, Seungmin, who relishes the opportunity to be treated like a "good boy" by a stern, demanding "daddy."
This is a story where the strict, experienced top enters a hidden gay encounter with a bottom who exudes a wholesome conyo image and may seem out of place in a no-nonsense gym, but who desires theclaimer he should not know everything about Admits his fantasies to a man he soon finds out cannot resist teaching his eager student a lesson with his body.