Dead End Reloaded

A reclusive soldier who survived the third world war, Yuuhi, collaborates with a brilliant scientist, Keina, on a confidential experiment involving particles linked to time and space. Shortly after the experiment, both are killed by an unknown assailant. Yuuhi awakens to find himself transported back to a time prior to the experiment's beginning. As they experience repeated cycles of death and revival, their relationship deepens while they work to uncover the secrets surrounding their situation. Yuuhi seeks to protect Keina from death and avert the impending chaos of the future.