On summer vacation, Shinji visits his beloved aunt Yuu's house and stays late in her room, fantasizing about touching her as he's captivated by her lewd appearance. However, the suspicious men around Yuu are actually part of her secret—due to her husband's debts, she's been forced to let men from the town use her body. When Yuu confesses her situation to Shinji, he blames himself for failing to protect someone dear and falls into despair. But Yuu gently comforts him, and the two, overwhelmed by emotion, plunge into intense, passionate sex.