If Ji ● Ko is big, it will be popular! ... Yumi hears a casual conversation between her son and her friend, and tells him that the value of a man is not the size of a man. The sons had a stupid question, "Can a woman distinguish her beloved man's cheeks?" And held a "chi-ko guessing game" in which Yumi guessed her son's cheeks. To do. Yumi reluctantly participates in the game for education, but ... I can't hide her nasty nature in spite of the magnificent view of energetic Ji-ko.