Life with her serious and emotionally distant husband had been calm, yet gradually slipping into monotony. One day, her brother-in-law, Tetsuo, visited the house. Drawn slightly to his bold advances—knowing full well his reputation as a womanizer—Kana hesitated but ultimately rejected him, trying to stay loyal. However, overwhelmed by his relentless persistence, she gave in and ended up sleeping with him. Experiencing pleasure unlike anything she'd ever known with her husband, she was driven to repeated orgasms by his deep, thrusting motions, astonished and overwhelmed by this new, intense ecstasy. Yet guilt over betraying her husband led her to repeatedly refuse Tetsuo afterward. Despite her resistance, his advances showed no sign of stopping.