Crimson Reset

After half a year on the run, the vampire Eugene was ultimately killed, offered up as a sacrifice to boost a holy knight's fame. Just as his life ended in bitter regret, a chance to return came to him.

“I will never die like that again. If I’ve truly returned to the past, then I'll never regret anything a second time... no matter what it may take."

(Source: KakaoPage, translated)