The Kawakami family's son's friends always gather at the house, drawn by Yu's beauty and dirty talk, and it has become customary for them to join in on the Yuu. The dirty talk escalates and the conversation turns to a "guess your son's dick game." It's a prank in which the son and his friends hide their faces and expose their lower halves, and try to find the son's dick. Yu's expression changes when she sees the row of healthy young dicks. She can't control herself in front of her favorite food.