The Super-Weak Hero Has A Death Rollback Ability - Ch. 4 - The Demon Queen Helps The Hero Defeat Her?

[MangaDex]

 

[RKADE14]

She thought about it, she thought about helping him just to make it stop.

 

[Shamz]

Dude this is actually so meta. This is basically sealing the Demon Lord in a time loop.