The Regressed C-Rank Tanker Can’t Be Killed!

They called me their comrade—until things got rough. When the monsters came, my so-called teammates abandoned me without hesitation. I was left to be ripped apart by bugs, over and over again. But I didn't die. Instead, I awakened a rare ability: true immortality. I felt every death. Every regeneration. Hundreds. Thousands of times. Now, after returning to the past, I’m no longer the weak C-rank Tanker they once used as bait. I know what’s coming. I know who to trust. And I know how to survive. This time, I’m not dying— I’m making them regret ever leaving me behind.