After dying of illness, a woman is reborn as Celine, the selfish, overweight villainess of a popular novel and the sister of its heroine. If she stays as she is, the hero prince will kill her and she will meet the same miserable end the story gave her. Determined to escape that fate, Celine throws all her effort into reforming herself. Instead of simply surviving, she finds herself the target of doting and obsession she never expected, loved far too much by a yandere. Blending fantasy and romance, the story follows her hope of reaching a peaceful, happy life.