Blood Demon Reincarnation Manhwa
전생혈마 / Rebirth of the Blood Demon: The Cursed Tanker's Trial / Regressed Blood Demon

Kang San, an F-rank tanker with no talent, abilities, or skills, struggles at the very bottom of his profession as misfortune follows him. Then a divine messenger tells him that he was the Blood Demon in a past life. To atone for the sins of that life, Kang San must endure a series of harsh trials. In return, he is promised immense rewards, and he resolves to do whatever it takes. Can the weak tanker, drenched in blood, change his fate?