The Duke's Family Is Not My Problem

I'm the one who was abandoned, but I think I grew up with the healthiest mindset! I went undercover as the fake's lady-in-waiting, but when I got there, my old family seemed... off? I thought, "Not my problem!" and focused on my mission, but then... "Are you not going to live with us?" The eldest, who used to be controlling towards the fake, starts acting weird around me. "I never thought I'd feel such camaraderie and trust with someone of the opposite sex. You make me feel strangely comfortable." The second brother, who almost went down a dark path, managed to get his life back on track—thanks to me. I tried to ignore it and rush off to my next mission, but everywhere I go, I run into people whose lives are ruined. I mean, why is everyone so conveniently messed up for me to save them?! (Source: Kakao Entertainment Corp., translated)