Be mine only while your sister is on a business trip! A runaway drama of "Karen" who grasped her sister's boyfriend's weakness! Put up with masturbation and sex and have sex many times while your sister is not around and feel good with the two of you! Abstinence is lifted and you are absorbed in sex as you seek each other abnormally! Definitely the best series ever! Having an affair with her sister! I wasn't cheating, I was serious...! A few days when I piled up my body so much that I couldn't count! I can't go back!
