I’m Bound to an Immortal Girl

Lin Xi was reborn in a fantasy world and bound his life to a girl. If he ever strayed too far from her, he would die.

The problem was, that girl was inextricably tied to his birth, and she was also a great demon lord with amnesia...

In the end, Lin Xi had no choice but to adopt her, even if it meant facing endless trouble in the future.

Fortunately, he was no ordinary character either. He possessed a mysterious scale that could perform an almost "equivalent exchange" for anything!

"All right, I should think about what to offer in exchange..."