- I was withdrawn at home and only playing erotic games on my smartphone, and I noticed my sister's big breasts, and I wanted to practice the act of playing erotic games with my sister someday. One day, my parents decided to go on a trip for their wedding anniversary. - When the opportunity arrives, she takes advantage of her sister's gentle personality and succeeds in making her listen to what she says. - At first, she was a sister who hated it, but she seemed to like disgusting things and was shy, but gradually began to respond to my requests from myself ...