Stealthily fucking her sleeping stepsister Iori Kogawa

Iori Kogawa has a sleeping habit where no one can wake her up at night. This was known to her teenage brother, so he decided to go into her room in the middle of the night and have sex, even recording the video. The younger brother even ejaculated into his sister, making Iori confused the next day. It went like that for a few days in a row and one day he even invited you to come and fuck his stepsister.