I honestly hope the "brother" isn't the ML tbh. I get that this is the plot but I personally js don't know how to feel about it if they do end up tg. The whole may have feeling sexual aroused but still calling her, his sister meanwhile js doesn't sit right to me.
He is calling her "sister" in a sarcastic way spoiler of course there will be a change in his negativ traits like any typical novel//webtoon and a chase arc of course
I honestly hope the "brother" isn't the ML tbh. I get that this is the plot but I personally js don't know how to feel about it if they do end up tg. The whole may have feeling sexual aroused but still calling her, his sister meanwhile js doesn't sit right to me.