Ruka to Ita Natsu

Ruka to Ita Natsu

Finished

琉伽といた夏

Toono-kun's life spirals out of control after a mysterious accident at his school. A sudden flash erupts in the schoolyard where his younger sister Yayoi is practicing track and field, injuring several people, including her. Yayoi is released from the hospital the next day, but she no longer acts like herself.

Toono soon discovers the shocking truth: his little sister has been replaced by a soldier named Luca, who comes from 31 years in the future. Toono alone knows this secret, and he must navigate the strange new reality while dealing with the consequences of this inexplicable event.

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