I don't even know how to say this because I kinda forgot everything that happened in the novel but he DOES treat her better in the novel, Seo-ah isn't her real name (there's like a whole story), there's a reason why she's insisting on staying with the ML, and half of the plot hasn't even folded yet so it's too early in this point of the manhwa to fully grasp the characters and the story
I don't even know how to say this because I kinda forgot everything that happened in the novel but he DOES treat her better in the novel, Seo-ah isn't her real name (there's like a whole story), there's a reason why she's insisting on staying with the ML, and half of the plot hasn't even folded yet so it's too early in this point of the manhwa to fully grasp the characters and the story