Boku no Nakama wa Isekai Saikyo Undead

Synopsis

After being transported from college life to another world, timid Yuuma expects the promised advantages of a special ability. Instead, researchers imprison him and repeatedly dismember his body to study his regenerative immortality, leaving him trapped in relentless pain. An unexpected encounter with Eva, a young woman inside the facility, gives Yuuma a chance to challenge the life forced upon him.