Baek Ihae, utterly alone in the world, finds herself possessed into a grim 19+ romance game—right before the gangster male lead goes full yandere. Suddenly living in the infamous Seo crime family’s house, she panics: “No way… I didn’t get marked by the gangster ML, did I?!” To protect her peaceful, ultra‑supporting‑extra life, she must prevent baby gangster Seo Dogyeom from “blackening” and somehow steer the story toward a happy ending. Caught between school life, romance, and the game’s threatening rules, the relationship between Baek Ihae and Seo Dogyeom begins to subtly shift. “Why are you only ever kind to me?” A sweet yet dangerous survival romance where letting your guard down for even a moment could be fatal.