Just Twilight - Chapter 70

Seo Tae Hyuk, jailed after being falsely accused.

【Explosive New Book】 At Thunder Sound Hall, the Great Saint fell! With the Life and Death God Talisman, he reversed time and space; the Monkey King, unyielding, returned against the heavens! All gods and Buddhas lost their colors, my fate is determined by me, not by the heavens! In this life, I, Old Sun, will make all the gods and Buddhas remember this name— I am, the Great Sage Equalling Heaven, Sun Wu Kong

The eldest daughter of the Li family is beautiful and sassy, ​​she took space materials to flee famine, and after going through many difficulties in war, disease and epidemic, she united with her family to regain the glory and harvested a beautiful boy.

- Description from novelbuddy

After 2000 years has passed, the ruthless demon lord has just been reincarnated! But his aptitude at an academy for nurturing candidates for demon lords is, “Inept”!?

Having the capability to destroy humans, elementals, and gods, after a long period of countless wars and strife, Arnos the demon lord became sick and tired of all that and longed for a peaceful world, so he decided to reincarnate to the future.

However, what awaited him after his reincarnation is a world too used to peace that his descendants became too weak due to a huge weakening in magical powers.

Arnos enrolled in the Maou Academy established to find any students that might be the demon lord’s reincarnation, but his powers are too extraordinary that those in the academy couldn’t properly judge his powers, so he’s regarded as an “Inept student”. Being underestimated and avoided by most people there, he recruited a girl friendly to him, Misha, as his subordinate and comrade, and strives to climb to the top of the demon race hierarchy to one day reclaim his former title and status.