"I decided to get married." Mayu, my mother's best friend, has been thinking about her since she was a child. Her son Satoru couldn't hide his turmoil in her sudden declaration of marriage. I try to be cheerful, trying to drink the last night of my bachelorhood, but my heart is not clear. But don't get married! I can't say that ... Mayu, who drunk her mother, approached there. "I'm going to be a married woman from tomorrow ... So, I want to make good memories with Satoru-kun at the end." Satoru is confused by Mayu who boldly pushes big tits.