Niro has always been unlucky. Whether that be his parents leaving him at a young age, him always being weak while growing up, or his eventual death as he was hit by a bus. He was always unlucky. After his death Niro wakes up in God's living room! God explains that Niro's terrible luck was because of his mistake distributing his luck and fortune. As repentance, God gives Niro a chance to reincarnate in another world and live as he pleases.
"I'll make you the strongest hero with the strongest ability of hypnosis. Live as you please young one."
"Does that mean I can do whatever I want? Even something that would be considered bad?"
"Do whatever you want. Consider it a prize from me" God said as he winked.