The Demon Venerable Shrinks and Gets Picked Up by the Immortal Venerable

[Two male leads + sweet romance + master + disciple + both are each other's only partner] When the Demon Venerable Xuan Yu failed to withstand the heavenly tribulation, a bolt of lightning turned him into a tiny little demon cub. He had only just transformed when he came face-to-face with his archenemy, the aloof Kunlun Immortal Venerable Shen Qinghan, whom he had fought all his life. The Immortal Venerable didn't recognize that the little creature was his sworn foe. Feeling sorry for the lonely, pitiful thing, he brought him back to Kunlun Mountain and took him as a disciple, showering him with wholehearted affection. Xuan Yu planned to act obedient until his injuries healed, then sneak away and return to settle the score with the Immortal Venerable. But after being cherished and doted on by the Immortal Venerable day after day, he gradually fell for him and abandoned all thoughts of revenge. He clung to his master and refused to leave.