During summer vacation, Iori Ryouko's son brings his friends home. Pretending to study, they freely roam the house and become fixated on Ryouko's voluptuous figure. Ignoring the son's protests, they peek under her skirt and spy on her while she's bathing. Late at night, they sneak into her bedroom, pin her down while she sleeps, and take turns violating her body at will. The next morning, without the son's knowledge, Ryouko becomes their plaything, enduring days filled with humiliation and shame.