That Time I Got Reincarnated as Veldanava

Satoru Mikami, a 37-year-old bachelor, reflects on his ordinary, lonely life while meeting his younger coworker Tamura and Tamura's fiancée. During their conversation, a knife-wielding attacker strikes, and Satoru sacrifices himself to save Tamura. As he dies, mysterious voices grant him skills( votw, but after angrily condemning the world's unfairness and claiming he could build a better one, the system accepts his challenge. His skills are erased, reality's authority is transferred to him, and he is reincarnated as the new omnipotent Creator of the world.