Re:ゼロから始める異世界生活 Reゼロ 腐ゼロ リゼロ 리제로
Light Novel series by Nagatsuki Tappei. Later received anime adaptation in 2017.
Follows a boy named Natsuki Subaru as he dies and gets trapped in a fantasy world, only to discover that he can come back from the dead at certain "checkpoints", though they change randomly. What seemingly starts off as a generic 'character ends up in a parallel world' plot changes quickly.
The following tags are aliased to this tag: re:zero and re_zero (learn more).