Emiko (RYU) who lived apart from a husband one year ago is Ryusuke and two livings of the son. Ryusuke watches it when mother does Masturbation in a room, and, at a certain night, the feelings that it is strange sprout for mother. Ryusuke who cannot cover the Koufun to see a sexy figure not to usually show of mother confides So to mother, and press it for relations. While mother is at a loss; if "is sex education"…Consent to to, and do an initial lesson of the sex education with own body for a son.
