Synopsis
Daiki Rusuhara—you’re a two-time college entrance exam failure, a NEET-in-training languishing at home as a ronin student. Your father has already passed away, and you live with your mother and younger sister Mao in a quiet, unremarkable household. But somewhere along the way, Mao, who once adored you innocently, has grown into a bratty girl who constantly provokes and mocks you. To make matters worse, her breasts have grown dramatically over the past few years, frustrating you both mentally and physically. “Seriously… acting all high and mighty with those huge breasts…” you’ve thought countless times. One night, you dream of a Mao with demon horns, a tail, and bat wings giving you a paizuri, leaving you helpless but cumming hard. Unaware of this, Mao visits your room and mocks you for filling the trash with tissues and having morning wood, smirking the whole time.
One day, your mother confides in you that Mao has been sleeping in class frequently and sneaking out without saying where. She asks you to look after her before leaving for a business trip. Despite Mao’s attitude, she’s still your sister, so you agree. When you gently warn her about dozing off at home, she shoots back: “I don’t need advice from a pathetic ronin like you.”
But when she falls asleep on the couch, her body begins to fade away transparently. What does this mean?! Startled, you shake her awake. She opens her eyes and shows you affection for your concern, but quickly reverts to her usual sarcastic self. You’re irritated enough to retreat to your room, but after some time passes and Mao doesn’t call you for dinner as usual, you feel uneasy. When you emerge from your room, Mao is nowhere in the house.
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