What can be said about this series? It made very little sense.
Basically, nothing was explained, ever. Nor was it expanded upon.

You're told right off the bat that Mo is a demon and it's like... Ok, sure, demons exist in this world. And I guess he's being surpressed? Along with his roommate... Alright cool.
His powers are never explained nor do they go into detail. They eventually talk about how he was created as if it's something important, but there's nothing to show why that is. His powers are never even demonstrated, he may as well be a human in this story, it wouldn't really change the narrative.

Additionally, it never gives a reason why CEO falls in love. It literally happens out of nowhere. And then there is zero progress. And then all of a sudden they love each other? Maybe? It's more treated like an excuse to keep saving mo than an actual plot point.

Then there's this deer that keeps being mentioned. That is brought up as though it's also important but it's never elaborated on or anything. I guess there was a deer spirit in the hyungs past? And the eyes are the same as Mo's? Sure.

Then, the roommate. He's mentioned as though he's important. He also has unknown demon powers that stay unknown. He shows up in all of like, four panels and for no reason at all. He literally didn't need to be in the series whatsoever and it would have made zero difference.

References to other characters as important are nothing but words. There are apparently a lot of powerful people backing mo behind the scenes but it never says how they're related or why they're helping or anything really.

Basically, this series is 44 chapters of them vomitting information at you but never explaining it or expanding upon it, so at the end you know a lot of random "facts" about the world they created but nothing substantial or meaningful. It's as if I read 44 pages of a dictionary. It's all information but none of it applies to each other and in the end it's useless to know.