Blood Demon Reincarnation

Kang San is a bottom 1% tanker with no talent, abilities, or skill. Misfortune follows him until a divine messenger appears before him one day. *"You were the Blood Demon in your past life."* To atone for his past life's sins, he must endure harsh trials. But in return, he will receive immense rewards? *"Fine. I'll do whatever it takes."* Can a weak F-rank tanker drenched in blood change his fate? (Source: Naver, translated)