MTL - My Koi Sister is Three and a Half Years Old - Chapter 13 White tiger repays kindness

Ella was betrayed on her 25th birthday by Alpha Eric, leading to a one-night stand at a bar. She Initially mistaking Eric for just a call boy, later, she discovers that he is actually an Alpha of a pack, leading to an unwanted pregnancy. She ran away without a trace, bearing and taking care of the twins alone. It's later turned out to be an interesting romance. What happens when Eric discover that the twins are actually his? Will Ella forgive Eric for betraying her?

The sky thunders, Fang Yue, the nail household, dies on the street, the heavenly court blackmails, obtains compensation, reincarnates, and sees how Fang Da Devil disturbs the universe and upset the world.

- Description from MTL

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.