Yoshimura, who was the director of the synchronized swimming club, was dismissed from disciplinary action six months ago due to corporal punishment of his students. Ellen, a student who worships Yoshimura, rushed to her house and asked for Synchro's guidance. However, the training gradually develops in a distorted direction, and Yoshimura who can not suppress his sexual impulse extends to netinechi and insidious obscene acts, but Ellen is a masochist talent hidden in such acts. It bloomed all at once and was happy to accept it ...