So I'm a Twin-Tail Warrior Now. So What?

Y/n was a standard Kuudere until he and a few of his classmates, along with their teacher, were killed due to an unknown attack. All the other studetns got out, but they were the only ones to die.

Y/n then finds himself in a cave and realizes he's been reincarnated as a character he wanted to have the powers of, Tail Red.

After escaping the cave and being saved, he now works as a mercenary. However, Y/n can't even get one job in, as he, along with the one who saved him, are taken to another location. While the man's daughter becomes a teacher, Y/n becomes a student at the academy.

Now Y/n, along with his new classmates, will learn about the world, and for Y/n, find who made him, along with the others, die. However, Y/n notices something... odd... about what the church does.