The moment my mother Ayumi came across a scene where she was doing gymnastics with a balance ball, Tatsuya took a breath. An unprotected body that curves along the roundness of the ball. A line of sweat that oozes from there and travels through the soft skin. The bewitching sensuality of her mother's lustrous body fluids was so nasty that she shook her reason. This is not allowed ... Tatsuya pretends to be calm and desperately tries to control herself. However, Ayumi never dreamed that her child had such feelings and asked for gymnastics assistance.