Sudden rain. Interphone sounding. When I opened the door, my mother's friend was drowning. Bra and panties that become dew from the clothes that were exposed in the rain. The boy's desire becomes a weapon, and it attacks her. It is a friend of mother who can be taken to the boy only by a few days, and is able to bite Chow Po who is childish. And two forbidden acts go over the last line...