Young Mihina has been living as a mother figure after running away with a younger man. One day, she learns that Makoto is being bullied at school and senses he's feeling lonely since his mother's absence. She visits him to comfort him. Wanting to ensure Makoto doesn't repeat her own failed first love, Mihina suggests teaching him about sex, but he refuses. However, upon hearing her words, Makoto's groin naturally becomes erect. Mihina smiles gently and begins tenderly guiding him further...