What would you like if you could give one desire? Sakura Yamato, an antisocial genius, knows his perfect desire. When he is at home, as he lives alone, he spends most of his time with a collection of his younger sister, cheering everything connected with the younger sister. In addition to them, her only other interlocutor is the memory of the plush rabbit for a long dead senior sister. But one day the rabbit begins to speak now and claims that his feeling for Yamato will not lose anyone else. After turning into a woman with rabbit ears, he claims that this is his sister who comes from heaven to give him one desire from God.