I Ate the Villain's Heart Medicine, Now I Earn My Meals in the Demon Realm

[Timid on the outside, charming and soft-hearted survival-focused bottom x restrained, possessive Demon Lord top]

[Transmigration into a book + contrast-based cuteness + doting top + pure romance + multiple couples]

Jiang Runyi was a modern man crushed by life's hardships and forced to take odd jobs everywhere just to make ends meet. When he opened his eyes again, he discovered that he had transmigrated into a book and accidentally eaten a life-saving fruit belonging to the demonic antagonist.

He couldn't just die for no reason, so he went into full-on groveling, wailing, and begging-for-mercy mode. There was no way around it. He had transmigrated into a cultivation world! He'd have been fine with a world without magic. At least he could have scraped by. Why did it have to be a cultivation world? Here, anyone with a little spellcraft could just flick their sleeves and hit you twice, and you could really die!

He had no choice but to promise the antagonist a lifetime of unpaid work.

Jiang Runyi was crying on the inside. My money! My money! I hadn't even spent the money I'd earned working, hadn't enjoyed a single cent of it... I hadn't even gone to see male escorts or touched a six-pack yet. Was all that really out of reach now? Would I never get to enjoy good food again?

-

Xuan Chuyan was born with the ancient demon race's most powerful bloodline and carried a deadly inner demon from birth. That boy from another realm had barged into the demon realm, and somehow his presence soothed the murderous energy inside Xuan Chuyan. Even the serpent of demonic energy in his soul willingly coiled around the boy as if submitting to him. So be it. Keeping him around could be useful... As long as he didn't cause trouble, this venerable one would feed him...

-

Jiang Runyi (after causing trouble for the nth time): Um... Xuan Chuyan, are you angry?

Xuan Chuyan (patting his head): No. As long as you're happy.