Yuri (Sasahara Yuri) was nicknamed a bookworm during her school days because she spent all her time reading books. There was a time when she was expected to have a bright future, but she fell in love, got married, had a child, and before she knew it, she had become an ordinary housewife. One day, her son brought a friend home. The friend's youthful appearance was enough to ignite the sadistic desires hidden inside Yuri...