
The art is great, and the characters aren't bad, but the plot? It's so weak. Every time you spot a plot hole, the next chapter will have the main character monologuing something like, "Oh, actually, that rule doesn't matter because /insert random explanation here/"... It feels like they're constantly making up new stuff without properly explaining important details about her character. She seems like she knows what she's doing, but in reality, she has no idea, especially when it comes to her relationships with other characters (and her disciples!)
That said, I really enjoyed the arc about the three fathers and their sons, it was so wholesome.

I truly believe Mincheol from the past was a good lover. But sadly, he took her for granted as time went on. Growing up without his parents, he learned to act and speak in ways that earned him affection to fill that emotional void. However, when the FL gave him unconditional love, something he wasn’t used to, something he didn't even understand, he stopped putting in any effort. Her depression, caused by his debts and neglect, made him see their relationship as a failure, something he silently hated and resented. He didn’t try to properly communicate and even took advantage of her low self esteem and money. In his mind, moving on (through adultery) was the solution. The best way to move on from this failure of his...Well, Mincheol, regret is all you’ll have from now on, and no one can save you from it.
His mom died?
I think that's why he's mad. He has emotional baggage/problems. Really needs to speak with someone about his feelings before dragging her into his crazy