The man living opposite, feeling frustrated, peers at the leotard-clad body of the married woman through the open window, daydreaming about raping her Itsuka. One day, the man spots a woman broadcasting a candid masturbation session on a live chat. This woman is none other than the married woman who lives opposite and who he uses as masturbation material every day. Surprised by his sudden good fortune, he immediately sends her a screenshot and a letter, and begins to train the married woman's body and Kokoro...