(Everyday life, sister complex, mildly yandere, multiple heroines, supernatural phenomena)
A sudden personality-swap phenomenon turns Nakajima Yusuke's life upside down. His ordinary days are now infected by a sickness called love.
Thanks to it, this guy who was immune to romance gets hunted by his yandere club president, pursued by his sharp-tongued upperclassman, and branded an obnoxious playboy by his classmates!
But he refuses them all without hesitation. He needs to heal his little sister's legs, and romance is such a hassle. He doesn't want any part of it!
But the personality swaps are only the beginning. Nakajima Yusuke can only endure his wild, eventful youth, caught between pain and pleasure.
Ten years later, after healing his sister's legs, he looks back on the past and sighs. All he wanted was to heal his sister's legs. Who could have guessed that every single one of them would refuse to leave him alone!
"Yusai-kun~!"
"Yusuke~!"
Tonight is destined to be another sleepless night!