Strong/Smart MC

After suffering for years under the impossibly selfish demands of his Lady, Princess Kurika of Athrelita, the ever-suffering butler called Litt decides that enough is enough, and flees over the border to the neighbouring Gardeldo Empire. After taking the new name 'Lilt', he takes advantage of the Empire's meritocratic society to enroll in a prestigious vocational school to make a new life for himself, using the incredibly versatile set of skills he honed as a butler. -

Compared to our time, the current generation just aren’t as reliable” they said, “Still, isn’t he the son of the Hero?” How annoying.

It’s been over ten years since the battle between mankind and the demons ended. The children of the heroes who saved the world are all grown up.
One of them, Eirth, was a talented man, and everyone expected him to succeed his father as a warrior and defend his country, but Eirth was always wary of his father’s title.

One day, Eirth is shocked to find his father’

A street urchin of the slums, Vlad aspired to be a Knight. After being struck down by a flash of black lightning, he begins to hear the voice. At the same time, the Knight of the Blue Moonlight suddenly appeared with a goal to destroy Vlad’s world. The life of the backstreet boy had changed completely… Even if it’s not in the faraway night sky, Even if it may have fallen to a place no one could see, If it chooses to shine by itself, Then it must be a star. -

Cheonma Baek Jung-hyuk wakes up as the eldest son of the Dmitry family.
Dmitry's nerd, the eldest son pushed by the second son.
Public opinion doesn't matter.
Heavenly demon, no, Roman Dmitry
cannot live a normal life in the future..

Read manhwa Genius Prismatic Mage In the slums lived a young boy named Ray who lacked emotions. He suddenly gained the ability to see “colors” that no one else could, and he had the power to control them. One day, he lost his shelter, an underpass, and his friends to a magician. He even lost Niles, whom he had believed in and followed. The emotionless boy swore to take revenge, beginning his search to regain his emotions.

Jung Yeonshin was born with a short fate: being unable to live past the age of twenty. Although everyone in his family looked down on him, his skills were remarkable enough for him to create his own martial arts. One day, Yeonshin realized that he doesn't have much time left to live... This is where Jung Yeonshin, a terminally-ill genius, begins his desperate struggle to surviv

If there is an omen of disaster in the Hwarang, who else could it be besides Seol Yeongrang, who controls spirits? Hwarang Seol Yeongrang was prophesied as one who would bring forth disaster. The only way he could return to his ranks is by solving incidents, in turn proving he wasn’t the omen he was painted as. And whilst he ventures, a mysterious mad man named Zaha appears. In the era of Silla, where humans, yokai, and spirits roam, a hwarang’s requiem unfolds.

I returned to Earth after hunting demons in the otherworld for three hundred years. But I did not return alone