Ten-Thousandfold Return, Senior Sister, Please Behave

Zhao Mu transmigrates into the body of a noble heir who is about to marry a princess—only to be kidnapped by demonic cultivators because of his innate Pure Yang Body and sold to a Demon Sect.
He is rescued by a senior sister and thinks he has found a benefactor, but instead, disaster strikes. Fortunately, he awakens the Ten-Thousandfold Return System. When his Pure Yang is taken, the system compensates him with an even stronger Crimson Yang Sacred Body.
They steal his treasures and pills? The system returns something even better.
Relying on these rewards, Zhao Mu rises step by step to become humanity’s supreme prodigy—protecting the women he loves and leaving no enemies alive.