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Rei Nanami, a socially awkward high school boy and idol enthusiast, idolizes his perfect older brother, Ren, who attends an elite academy. When Ren suffers a mental breakdown and is hospitalized, he mutters about a mysterious “Wonder Rabbit Girl,” prompting Rei to investigate. Disguising himself as Ren, Rei infiltrates his brother’s prestigious school, uncovering a USB with a list of female students and their unique proclivities. Using this information, Rei interacts with classmates like Ayaka Ichii, whose specific traits he navigates to gather clues. Set in the competitive environment of the academy, Rei’s quest to uncover the truth behind his brother’s collapse begins with tense encounters and personal challenges.
