Saya's husband grew suspicious of her repeated refusals of intimacy and noticed her strange behavior at night. He hired the trainer Hayami to investigate, uncovering that Saya was secretly masturbating. To make her understand the allure of men, her training began. Unable to endure water torture, watersports, and simultaneous double penetration, Saya drowned in ultimate pleasure. Crying out in pain from whipping and candle play, she discovered new ecstasy through submission. Finally, she embraced her husband, sinking into a deeper, more fulfilling ocean of joy than ever before.