Immortal Cultivator and Rebel Boy

A boy with a righteous system. He wholeheartedly went to the righteous sect of cultivating immortals to learn from his master. The ancestor who was returned to the Demon Sect was brought back to the sect. Once he entered the Demon Sect, he was a demon for life. The righteous way won't accept me? I am the right way. The demon gate doesn't recognize me? I am the Holy Son of the Demon Sect. My faith is the right way. My body is a demon.