Botsuraku Youtei Nanode Kajishokunin wo Mezasu - Chapter 3-14

Elliot Hawthorne, had transmigrated into the body of a struggling apprentice mage, and now had one simple goal, summon a small, harmless spirit to pass his magic academy’s final exam. But thanks to a mistranslation in an ancient grimoire, he instead summons Azrael, the almighty Demon King.That would’ve been bad enough…. but then the spell accidentally binds them in an unbreakable marriage contract.Now, Elliot is stuck with a possessive, dangerously powerful, and ridiculously affectionate demon husband who:Carries him everywhere because “His cute little summoner’s feet shouldn’t touch the ground.”Summons hellfire just to keep Elliot warm when he complains about the cold.Declares war on any kingdom that dares to call Elliot “single.”Refuses to be unsummoned.“Why would I leave? My husband is here.”Worse, every holy knight, exorcist, and jealous god now wants Elliot dead for “stealing” the most powerful demon in existence.. Stuck with a one-in-a-million system dungeon and a devilish Demon husband, Elliott's life is constantly on the brink of disaster...But when Elliot starts uncovering secrets about the contract, he realizes…Did I really summon him by accident? Or… was Azrael waiting for me all along?One way or another, Elliott’s unlucky life becomes worse. An impending doom threatens the existence of the human and mortal worlds.And as if that wasn’t enough, he’s also stuck with a Demon for a husband.But maybe, just maybe… being bound to a dangerously powerful Demon King isn’t the worst fate after all.

Li Zhizhi was taken back to the capital at the age of fifteen to recognize her ancestral roots. As the true eldest daughter of the Li family, she should have been cherished. However, everyone preferred Li Suwan, who was knowledgeable, polite, and clever. As for Li Zhizhi, she grew up in a remote and impoverished village, ignorant of the ways of the world, and her name even carried a sense of disdain.

Short, rich, and handsome, Lin Feiran was always the center of attention. But after transferring schools in his second year of high school, he discovered that his limelight was snatched by his Adonis classmate, Gu Kaifeng.

Lin Feiran was very resentful, and he and Gu Kaifeng became archnemesis (one-sidedly). Although the two lived together, they were like strangers.

When Lin Feiran went back home to attend his grandfather’s funeral, he accidentally inherited the Yin-Yang eyes that had been passed down from generation to generation. After gaining the ability to see ghosts, the timid Lin Feiran discovered that his two-person dormitory was actually a sixteen-person (ghost) room. Every day, he was scared to the point of collapsing.

The more aggravating thing is that because of Gu Kaifeng’s innate body constitution, he possessed an abundant amount of Yang energy. Lin Feiran found out that whenever he touched Gu Kaifeng, Gu Kaifeng’s Yang energy could temporarily disable his Yin-Yang eyes. A light touch would disable it for five minutes, a kiss for an hour, and so on…

Lin Feiran had no choice but to throw himself into his archnemesis’s embrace. This complete reversal in attitude to being intimate with Gu Kaifeng persisted every day from morning till night.

When sleeping, he must squeeze in the same bed as Gu Kaifeng. Going to the toilet? He must drag Gu Kaifeng with him. Homework? It must be done hand-in-hand with Gu Kaifeng… He also had to try his best to persuade the teacher to make him Gu Kaifeng’s deskmate. Every day in class, he would rub Gu Kaifeng’s calf with his foot beneath the desks…

Following the clingy little bastard’s sudden change in personality, the initially shocked Gu Kaifeng gradually became smitten. Every day he would chase Lin Feiran to flirt with him, make crazy confessions, and even routinely push him against the wall and kiss him…

Gu Kaifeng: “Don’t you like me? I like you, so let’s be together.”

Lin Feiran: “I don’t like you! Don’t come over!”

Gu Kaifeng: “……”

Five minutes later, to avoid seeing ghosts, Lin Feiran sneakily came to touch Gu Kaifeng.

Gu Kaifeng turned around, stopping his hand: “After you just rejected me, you come back to flirt with me!?”

Lin Feiran: “Who’s flirting with you! I was careless and touched you; don’t imagine that I like you back.”

Oh, that’s it.

- Description from Novelupdates

It’s a story about a man who got transported into a novel and possessed a slum boy. He met a noble girl and served her as a butler for 13 Years. Now the girl has already fallen from her noble life and lives in an abandoned mansion with paralyzed legs. Why did she become like that? Of course because she is the villainess in the novel.