[Hunter X Hunter] I've Wanted to Die for a Long Time

This is probably a win-back-your-lover (?), relationship-recovery story.

Xiaobai has always felt that life is meaningless, and really wants to die. But ordinary ways of dying are too boring, so he developed a Nen Ability to give himself a death that would be unforgettable and one of a kind. The problem is, he developed an ability that completely heals him as long as he doesn't suffer a fatal injury.

Xiaobai: ???

The story is roughly about the protagonist developing an overpowered ability that lets him recover instantly as long as he isn't killed in one blow, then bouncing between the Phantom Troupe, the protagonist's group, the Chimera Ants, and all sorts of other groups.

Everyone's attitude toward Xiaobai changes from initial dislike and disgust, to indifference, to happily playing around with him, and finally to regretting everything as they try to win him back (or win back their friend) at the relationship-recovery crematorium.

Feitan Portor (torturing someone): You'd better hope I don't find your weakness.

Feitan (gaming): You're nowhere near good enough.

A-Fei (on the road): If you can't keep up, go back to Meteor City and be my servant!

Tanzi (holding hands): Hey, don't go dying on me so easily.

Theme: Maybe everyone will finally face their true feelings only after someone dies