Time Thief Paradox

In this world, there is a group of people called "time thieves". They do not steal physical time, but use a secret technology called "memory resonance" to sneak into the last moments of dying people, steal their "future time that they should have", and sell it on the black market to rich people to extend their lives. The protagonist finds himself in an "island of time" that is constantly being reset. He must uncover the veil of this huge organization and face an ultimate moral dilemma: Does saving one person's life mean having to steal another person's future?