Alexian07's manga / #Nobility(2)

"You want me to pretend to be the prince's lover? This sounds like an easy payday!" Lai is a man who's known to solve any problem for cash in the underworld, and he has been commissioned by Edwin, head of the noble Theodore family, for a secret mission. He needs Lai to stand in for his missing brother, Ellen; thankfully, the two are nearly identical. The aristocracy is rife with rumors about Ellen's love affair with Prince Hector. Lai, now living as "Ellen" in the royal palace, is subjected to harsh treatment and repeated bullying. Where the hell is the real Ellen? What secrets lurk beneath the relationship between the crown prince and his paramour?

Heavenly demon ends up transmigrating inside the body of eldest son of the Dmitry family who is a useless trash. ..as usual he is trying to learn about this new world & adapt & improving his strength .. so glad he annulled the engagement with the fiance