Accidentally Invincible While Tutoring My Sister

When Zhong Yuan watches his sister die fighting monsters, a golden coffin hurls him four years into the past with one impossible gift: 100% absorption of alien powers. His mission? Enroll as her study companion at the Esper Academy and rewrite fate. But there's a problem—he's just an auditor, bottom of the food chain, facing bullies on day one. While Zhong Yuan quietly masters god-tier abilities to protect his twelve-year-old prodigy sister, she's busy terrorizing the entire campus. Soon everyone's begging him to rein her in, but he's too busy playing the doting brother. They call him weak. Th…