In order to attend a prep school in Tokyo, Yuzuru decided to live at her brother's house. Due to the stress of her exams, she becomes aware of her gentle and beautiful sister-in-law. A few days later, at dusk, Tsukasa returns home from her shopping, soaking wet from a sudden downpour. Yuzuru's wet hair, see-through brassiere, and adult sex appeal make her irrational, and Yuzuru hits Gamushara with her libido. She said, "No more..." She thought she would be kicked out of her brother's house...
