My companion is the strongest undead in another world

Yuuma, a shy university student, finds himself transported to a strange new world where he is granted an extraordinary power. Instead of the exciting adventure he imagined, he faces relentless suffering and brutal experiments. His body is repeatedly torn apart, enduring unbearable agony, yet his cursed gift of eternal life forces him to regenerate over and over. Trapped in a nightmare with no escape, he cries out in despair, questioning his cruel fate.

Within the dark confines of a research facility, scientists exploit his immortality, treating him as nothing more than a test subject. Just when all hope seems lost, he encounters Eva, a mysterious and beautiful girl. Their unexpected meeting becomes the turning point in his harrowing journey. With her arrival, Yuuma’s existence in this unforgiving world takes an unexpected turn, offering him a glimmer of hope amid the endless torment.

As their bond deepens, Yuuma begins to uncover the truth behind his summoning and the sinister forces at play. Eva’s presence ignites a newfound determination within him, challenging the despair that once consumed him. Together, they navigate a world filled with danger and deception, where survival is never guaranteed. His once-miserable existence now holds purpose, but the road ahead remains treacherous.

Will their connection be enough to break the cycle of suffering? Or will the darkness of this world prove too overwhelming? Yuuma’s struggle for freedom and meaning unfolds in a tale of resilience, unexpected alliances, and the will to defy fate itself.