
I don't know about you people but I really like the twist for this. Although yes, I hated the MC's sister at the start but I also can't help but find her circumstances pitiful. Atleast she didn't grow up to be a total psycho where she murdered her sister like with other manhwas just because of pity jealousy, she just kicked her out of the house and took the fiancé which she thought had loved her because of her anger to the unfairness to it all. I've seen people in reality do the same thing but just because of jealousy and without even a deeper reason to it. And I can also agree that what MC did as a child was messed up hence the current circumstances but I also can't blame her current self when she can't remember them anyway. I'm just happy that they didn't end up exacting revenge towards each other and each got their happy endings. Due to the way Ercia grew up, you can totally see how she feels betrayed by her family by the way that she asks "what is family for you" to some people that she meets and she mentions about sacrifice and such.
I can't really explain in depth why I can feel sympathy for them both and still quite like the story without being off putted by it like most others in the comment section. It's just an interesting take on most manhwa stories that I've read where it now feels boring reading the same usual recipes and cliches