Betraying One's Master

His mother died when he was three, his father when he was seven. Though he was the esteemed heir to the throne, his uncle usurped his position. At the brink of death, someone saved him, and from then on, he had a master in this world. His master was handsome, powerful, and peerlessly carefree. From that moment, the precocious boy could see no one else.

By his master's side, the disciple's reverence slowly changed into a desire to possess him exclusively. But in his master's eyes, he would always be nothing more than a disciple, unaware that even a single glance at anyone else could drive the boy mad.

He followed an extraordinary master from beyond the world to learn martial arts, and became unparalleled in medicine and poisons. Though he knew better than to meddle in other people's affairs, he softened when he encountered a young prince being hunted down. He saved and sheltered him, and from then on began a life of regret.

He worked hard to raise the boy and devoted himself to helping him succeed, thinking him his most thoughtful little disciple, obedient and sensible. He never expected that one day the beast would insist on making him his bride.

Him: ...

The disciple is obsessive and arrogant, seizing him by force and making it clear he will stop at nothing to claim him.

Furious, the master glares at his lofty figure and roars, "To hell with you being my disciple! You ungrateful wretch, can I still kill you now, while there's time?"

But in the end, he can't bring himself to carry out the threat. He has become pregnant with the disciple's child...

[Younger male lead, raising him from childhood, a disciple secretly in love with his master, and a story about doing whatever it takes to keep him by his side]

[A seemingly harmless, inwardly dark and possessive, obsessive disciple top x a gentle master who turns dark and falls into madness after certain events, bottom]

Theme: Everything has a crack in it. That's where the light gets in