Kogiku Tsukishima has come to Tokyo for the first reunion in decades, but she is more worried about whether her only son, who came to Tokyo earlier, is doing well. Kogiku was nervous because she shared a room with several of her friends, but only her son greeted her. Her son was asleep as she cleaned her messy room, reassuring to see her son in good health. Kogiku was happy that she didn't change, but the scent of young people in her room and the excitement of her coming to Tokyo made her body hot, and she secretly masturbated. Oops. She is seen by her son's roommate who shouldn't be there...
