My Well-Behaved Disciple Is Actually a Dark, Unhinged Lunatic!

[Two male leads + cultivation + transmigrates into a book + beautiful, delicate bottom (cultivation furnace) + everyone is obsessed with him + sweet on the outside, dark within + forced love + master and disciple + pursuing his wife later] [Jealous, possessive green-tea top & steadfast, protective, straight-laced bottom] (The top acts like a jerk early on, please don't @ me) Ning Qixing wakes up one day after transmigrating into a book. He's entered the world of a novel and must complete a mission to return home. Ning Qixing is near tears. If he wants to go home, he has no choice but to do the mission. He sets out to change the original male lead, Xi Yan, for the better. He tries to win him over with familial affection. When his disciple is in trouble, he helps. When his disciple is bullied, he steps in and drives the bullies off. When his disciple is in danger, he shields him and takes the injury himself. Whatever his disciple wants, he gives it to him. Even if he asks for the stars and the moon, Ning Qixing will pluck them from the sky. In short, he'll do whatever it takes to get home! But one day, just as he's about to complete the mission... The System breaks? He looks at his disciple's gloomy expression, then at the System, which has shattered into pieces after its corruption level got too high and now lies unconscious... He falls silent. Where did he go wrong raising him? Xi Yan Xi Yan has been reborn. He already knows that the world he lives in is the world of a storybook. And he's the male lead, a bottom character who's only there to suffer for the sake of angst. Even his partner is a man. He doesn't understand why his life has been so hard. But now that he's been reborn, Heaven has given him another chance, and he's going to start over. But when he opens his eyes after being reborn, the first person to rescue him this time is a character he never met in the book! To find out more, he agrees to become his disciple... His heart is softened by every thoughtful act, one after another. He admits he's fallen for him... But one day, he accidentally learns that his master only came to be by his side to complete a mission...