The son who cannot help being worried about Beautiful buttocks of mother. Be indulged in Daydream while always watching back figures of mother cleaning it, but just hand appears in the on that day excessive Koufun. Were Yui to be upset by, but be off its guard, and leave the body of just So to the son who too applauds one's buttocks. The action of the son who might taste longed-for buttocks to one's heart's content escalates and….
