The male protagonist transmigrates to a crossover world where everyone has died.
Although he has a younger sister named Gasai Yuno, he isn't Amano Yukiteru.
His upperclassman Rin Tohsaka can't use magic, Kusuo Saiki has no psychic powers, and Kaguya Shinomiya is just rich.
Then one day, Hitagi Senjougahara falls out of the sky. He catches her in his arms, only to discover she weighs a mere five jin.
That's when he realizes his everyday life has fallen apart.
Rin Tohsaka has gone to work part-time, Kusuo Saiki is now Kusuko Saiki, and Kaguya Shinomiya has been constantly trying to outsmart him. Meanwhile, his sister Gasai Yuno is always picking fights with Mana Ouma, and the two keep making deadly dishes to poison each other.
Ah. His ordinary life is gone forever.
