Time Travel and Counter Time Travel
Original trajectory and changed destiny
"Why do you have to go back with me? It's very dangerous there. You may die at any time after the war starts."
"Ah, even though I'm just a monster who likes to mess around, I still hope to help you with some descriptions in the original work. Also, I want to give them an ending without any regrets."
Intention: All members want to survive. I hope everyone will be happy when I write it.