Ellie lived with her sister Yaxin and her boyfriend Ayi. They usually took care of each other. One day, Ellie got angry when she couldn't play a new game. Ayi stepped forward to teach her until her sister finished cooking. Her sister hurriedly After going out to work, Ayi and Aili were left at home. The bored Aili teased Ayi and dragged Ayi to her sister's room. Ayi felt uncomfortable but could not resist Aili's formula and started an affair with her.