GVG-154 My Big Stepsisters Real Sex Ed Hikaru Konno

One day, my sister Hikaru and my younger brother Tomoki discover my father's adult DVD. Tomoki, who is ignorant about sex, talks about DVD in front of her mother, and a crack runs in her home. Taking this opportunity, Hikaru decided to teach Tomoki about sexual knowledge with her own body, but eventually Hikaru began to feel different from education.