Ringo lives with her boyfriend. One day, Mikan's sister came to visit, but it was at the same time that they were both away from home. While waiting, she was sleeping on the sofa in the living room, and after sleeping for a while, her sister's boyfriend came back, saw that she was sleeping soundly but was wearing a very sexy suit, only wearing a thin sticky shirt and underwear, so the boy was very excited, unable to control herself and went beyond her limits with her future sister. In particular, the sister slept so deeply that when the boy used the sextoy, she still did not wake up, even moaning unconsciously.