Beneath the Dragoneye Moons - Chapter 13: Lessons on Magic

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.

Maple was the strongest player in the game of new world online, however, Kaede Honjou was just your average Japanese lady who just wanted to spend some time with her girlfriend and the rest of her friends.She never imagined she would be summoned to another world so similar to her favourite game as a weapon for war.Join Maple as she fights through a dangerous world, while gaining the attention of the powers that be...Although...“How does a slime create a country? That seems a little ridiculous, even for me.”

Finally caught up with the trend of crossing. Wait, everyone else has a golden finger when they cross, how can I become a little beggar after crossing!

Fortunately, the memory is still there, watching how I transformed from a little beggar to a top rich man!

- Description from novelbuddy

He became a teacher at the best magic academy in the empire.
….For being mistaken for someone else.