The beautiful fifty mother's mother could not stand the mature body and drowned in the forbidden fellowship with her son. Kenji, a friend who went to return the forfeiture, accidentally witnessed his parents. Kenji, who was excited by obscene acts, visits home again in the absence of oto. Kenji who erases big mother in front of obscene friend's mother. The mother who saw it from the strong appetite herself exposed the naked body and hoped to associate with Kenji. The metamorphosis of the metamorphosed goji mother who spends a lot of tide and goes mad!