I was reincarnated as an extra character in the magical girl anime that my niece loved to watch. In this world where stones replace people, I thought if I avoided getting involved with anyone and made it to the end, I could return home. "Come forth. I have something important to say to you." The final boss showed up at my house, even though I never gave him my address. "Ugh, fine. Yeah, I quit. Isn't it about time I quit? I'm tired and fed up." The protagonist suddenly quit being a magical girl and holed up in her house. What’s even going on? I just want to go home. . . . "This world is doomed." I thought that as I looked at the situation around me. I didn’t want to do anything, just kill time until I could go home. But then, "You want to go home, don’t you? Let’s save the world together." A time traveler, who didn’t exist in the original story, appeared. He said if I wanted to go home, I’d have to help him save the world. "Trust me. If you can’t trust me, at least trust the name ■■■." He even knows my niece’s name, who doesn’t exist in this world? If saving the world is the only way to go home, then maybe I should give it a try.