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.