I Became the Regretful Obsessive's Little Sister

Title auto-translated

Also known as I Became the Younger Sister of a Regretful Obsessive Male Lead (Pre-serialization) · 후회 광공의 여동생이 되었다 · Huhoe Gwanggongui Yeodongsaengi Doeeotda

Story by Purple Lemon (퍼플레몬) · Art by Debin (데빈)

Synopsis

One day, she finds herself transported into an unfamiliar story. After losing her new parents and being adopted into a duke's household, she finally figures out what work she's landed in — a BL webtoon that ends in tragedy, with every single character dead. She's a side character, and the first one to go. Worse, she's fated to be killed by Lucian, her absolute favorite. Fortunately, the catastrophe is still a long way off, and being adopted into Lucian's household gives her plenty of time to change the ending. Her plan: soften Lucian into a kind-hearted person and steer the story toward a happy conclusion. But somewhere along the way, his obsession begins turning toward her instead.