my son's a muscular girl with a male winning body, but she's unexpectedly a good woman with a fishy manko.

Her son, Yota, was a martial arts lover and met her son at the gym. A muscular fetish who is a convex couple with his son but was attracted to his fine macho body and started dating because of tenderness. The two of them are still sweating in the room today and stomping, but they feel like sweat and muscle, but they get frustrated.