Chaoji Shen Jiyin

In the future, countless alien beasts will invade across the universe. Humans that devour the alien flesh can absorb their genetic powers, which ushered in an era of rapid genetic evolution. Han Sen, a newcomer to the base, became known as the "butt fiend" and despised by others. But in secret, he's actually the overpowered "B God" admired by everyone! Han Sen: Sorry, only I can take on the ultimate god-gene!

(Source: Kuaikan, translated)