It had been nearly two weeks since his wife left for her hometown to give birth. Daiki had been surviving on takeout meals, and the house had become quite messy. That's when Tsumugi, his wife's older sister, suddenly showed up offering to help clean up. Not only that, she even gave him a massage, providing what felt like flawless service. Tsumugi's touch was special—her hands moved sensually over his neck and chest, stirring excitement he couldn't suppress. Lying there, Daiki found himself completely entranced by her movements, unable to pull away, until suddenly, her lips parted and she fully engulfed his cock. A mature, erotic tale unfolds from this moment on.