Synopsis
Daiki Rusuhara—you’ve failed your college entrance exams twice and are now a ronin living at home as a NEET candidate. Your father passed away years ago, leaving you, your mother, and your younger sister Mao to live together. Though not particularly close, you’ve managed a peaceful existence. However, Mao, who once adored you innocently, has grown into a bratty girl who constantly provokes and mocks you at every turn. To make matters worse, her breasts have grown dramatically in recent years, leaving you frustrated in more ways than one.
One night, you dream of being pleasured by a demonic version of Mao—complete with horns, a tail, and bat wings—leaving you helpless as you climax. Unaware of your dreams, Mao visits your room and mocks you for filling the trash with tissues and having morning wood, grinning wickedly all the while. You’re fed up with her cocky attitude and those huge breasts.
One day, your mother tells you that Mao has been sleeping in class and sneaking out after school without explanation. Your mother asks you to look after her before leaving on a business trip. Despite Mao’s attitude, she’s still your sister, and you appreciate your mother’s constant support and encouragement. You try to gently scold the dozing Mao at home, only to be shot down: “I don’t need advice from a twice-failed ronin.”
But as Mao naps on the living room sofa, her body begins to fade and become transparent. What’s happening?! Startled, you shake her awake. She opens her eyes and shows a moment of affection toward her concerned brother before returning to her usual taunting. Frustrated, you retreat to your room. Hours pass without Mao demanding food as usual. Worried, you emerge only to discover she’s vanished from the house entirely.
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