GVG-631 — My Sister's Real Sex Education Mihina Nagai

One day, Mihina, who had been a mother figure to Makoto after he ran away with a young man, finds out that Makoto is being bullied at school. Thinking that Makoto must be feeling lonely without his mother, she goes to comfort him. In order to ensure that he doesn't fail with his first love, Mihina tries to teach him about sex, but Makoto refuses. However, Makoto's crotch is erect. Mihina smiles and gently teaches him...