"I'm..." Is he both? No, no, it doesn't seem that he's at both. "So wait, wait, when this is done, you can just... put me back where you found me... no, no, when you found me, and everything'll be fine. Right?" He does not know if he's going to like any answer that he gets, at this point. Stay with Hajime and end his world. Return and keep the world safe, and lose all of this with Hajime. But it's the same choice that he'd had to make before, isn't it? But she hasn't said so... "If I chose to stay... then would there be a me in that world? Or would I be gone? I... I'll make the right choice, when the time comes, you've got to believe me, but you have to tell me what'll happen!"