It's Coming in Three Hours: Kill the Japanese and You Will Become Stronger

[Anti-Japanese War] + [Travel] + [Parallel World] + [Brainless and Cool Article]... Kill a Japanese soldier and gain one day of longevity. If you don't produce nuclear weapons, I won't produce a leading actor... "Sakata-kun, you must stay away from a place called Cangyun Ridge, otherwise you will definitely lose your life here!" "Hahaha! Sakata-kun, just take care of yourself!" A kid with a samurai sword stuck in his belly laughed and said. "I will die to express my will, and I ask Sakata-kun to believe what I say. Otherwise... The empire will be over!" Jiuju, a little devil from the later generations who is a master of the school, said unwillingly. … The introduction is too weak, so please move on to the main text. (Definitely not AI, the author is a real person.)