Mate on Titan

You got Isekai to AOT world by strange girl who told you that well-known fiction story really happened in the real world and ask you to help her to break her curse. For that she teleport you to the past taking the body of Eren. And now you have to do what you can to save those people. For that you will need strength. Luckily, That strange girl gave you a mysterious power that make you stronger every time... you mate?​