Novel info
Ninja World: Power through Bonds

Reborn as Shimura Danzo’s grandson, Denji unlocks the Bond System—powerful rewards based on relationships. Naturally, he tries being a good guy. Zero rewards. Saves a life? Barely a blip. But the moment someone hates his guts? BOOM! Power-up unlocked!
Realizing grudges pay better than kindness, Denji ditches the hero act and goes full menace mode—provoking, annoying, and out-scheming the strongest ninjas just to farm bonds and break the system. Who needs friends when you can have overpowered enemies?