Konatsu, a grandmother, always spoils her grandson Shunsuke. Feeling sorry for his strict parents, she gives him pocket money, cleans his room, and does anything for her cute grandson. One day, while she is cleaning Shunsuke's room as usual, she notices Shunsuke, excited by Konatsu's cleavage, clutching his crotch. Konatsu decides to step in to help Shunsuke, who has yet to have any experience with women...
