Waka is a single mother. - Kaito, his only son, has grown up, and it seems like his time as a child is coming to an end. - Waka, who is still in the prime of womanhood, has a new lover and is enjoying being a woman, but when she tells Kaito of her intention to remarry, she is furious and refuses, saying, ``Don't take my mom!'' - After that, her lover leaves her, and Waka turns to alcohol out of disappointment. - Waka takes a turn for the worse and gets drunk, but she can't help but feel happy and happy at the immature part of her son and the part that has become a man. - Is it because of drunkenness, lust, or motherhood? - She ends up teaching her son, who needs her, how to handle the female body as sex education...