“Wow, my older sister is so handsome!” A duke who can’t take his eyes off me, a gorgeous and cool older sister, and everyone loving me—I thought I had been reincarnated as the youngest daughter of a duke’s family in a wholesome childcare romance fantasy world… “Wait, this isn’t a childcare story!” It turns out the novel I’ve possessed isn’t a heartwarming family story at all—it’s a revenge story! And to make matters worse, the character I’ve possessed is the villain younger sister who gets her comeuppance from her older sister, who was murdered by her in a previous life. “U-unnie (older sister)…” To survive, I absolutely must stay on my sister’s good side. And I just need to live quietly without drawing attention to myself! “Oh, I picked this up.” But wait… my sister is acting kind of strange? “If you get kicked out of the family, I’ll take you in and we can live together.” And who is this guy?! This is a survival comedy-romance where the reincarnated protagonist must navigate her role as the “villain younger sister” while her regressed older sister (who remembers being killed) and a mysterious male lead both show increasingly obsessive interest in keeping her close—turning what should be a revenge plot into something far more complicated.