Sumire's sexual desire was so strong that her boyfriend asked her to break up with him. One day, when she was looking for something in her younger brother Katsuhiko's room, she found an unused shoulder ticket that she had made a long time ago. While her parents were out on a trip, they found Katsuhiko masturbating outside her room, masturbating as much as she wanted. She remembers Sumire's shoulder ticket, and now she has a condo.