I Was D-Rank Trash—Reborn, I Slapped My S-Rank Brother & Farmed 58,000 Blood Qi in 72 Hours.

What the story is about

After being betrayed and killed, Qin Feng returns to his high-school awakening day with a hidden talent that permanently raises his Qi-Blood whenever he attacks a hostile target. He uses the ability to grow at extraordinary speed, taking on beasts and enemies while preparing to confront the family that cast him aside.