It's Better to Be the Demon Lord Than to Be the Master's Little Baby.

Shen Yuqing, as gentle as jade, vs. Ye Qingxuan, the loyal dog with a dark belly [Two male protagonists + master and apprentice + lower year + lower level offender] Shen Yuqing is recognized as the first person to cultivate immortality in Kyushu. Ten years ago, during the battle to suppress the demon clan, he lost his sister and became blind himself. My sister left behind a son before she died. He entrusted the infant Ye Qingxuan to a family in the world, leaving only half of the jade pendant as a token. "If you encounter any difficulties in the future, come to Lingjian Mountain with your jade pendant to find me." Ten years later, his family was ruined, and in order to survive, he went to become a disciple of the Spirit Sword Sect. When Shen Yuqing saw Yupei, he who had never accepted a disciple turned out to be—— He wanted to take this young man, who had no spiritual veins and was regarded as a waste, as his personal disciple. Later, it was discovered that Ye Qingxuan actually had demon blood and was the demon prince who was lost. After being abducted back to the Demon Clan to become a Demon Lord, he actually said, "I don't want to be a Demon Lord, I want to be Master's little baby."