Sasha's True Intentions
"One last thing, I'm glad I got to meet you." Without being able to understand Sasha's true intent behind these final words, much time has passed, and Ivis, one of the Seven Elder Demon Emperors, holds a special class at the Demon King Academy called the Great Magic Training. The Seven Elder Demon Emperors are seven demons that Anos, the founding ancestor, created from his own blood. Emilia implores Anos to act respectfully to Ivis, but without hesitation, he speaks to Ivis in a condescending tone.
Aired 18/07/2020EP 3 - Sasha's True Intentions

The Misfit of Demon King Academy: History’s Strongest Demon King Reincarnates and Goes to School with His Descendants
Anos, the Demon King of Tyranny, has defeated humans, spirits, and gods alike. But even demon kings get tired of all the fighting sometimes! Hoping for a more peaceful life, Anos decides to reincarnate himself. When he wakes two thousand years later, though, he finds the world has become too peaceful--his descendants have grown weak and magic is in serious decline. Intending to reclaim his rightful place, he enrolls in Demon King Academy, where he finds that his magical power is off the charts. Literally. And because they can't measure his power, the faculty and other students regard Anos as a misfit. With the support of Misha, the one student he manages to befriend, the misfit (Demon King) begins his climb up the demon ranks!
(Source: Square Enix)