Beginning of the End (Attack on Titan)

Humanity is lost. Things turn south. Everybody dies.
Now it's the future and Levi works in a bookstore, he runs into his comrades almost every day, no one seems to remember a thing, and Levi has to keep it to himself what happened with Eren and everyone else. One day Levi unexpectedly sees the love of his life, Eren. But it's not exactly Eren. Will this be Levi's second chance to love? Despite no one remembering anything, can Eren remember?

**this is a shitty description xD um, idk if this book is good either but please tell if not or if so, this is reincarnation, it's also ereri, so if you don't like it you don't have to read.