"No, this isn't where he's supposed to be. He's supposed to run into Margarite Hastings, he's supposed to ask for her hand. If he doesn't dance with Margarite tonight, their fated meeting will be ruined. They're the protagonists, so what is he doing here with me?" A gifted university student, Caroline Rosings, finds her life cut short after a tragic car accident on campus. Surprisingly, instead of death, she finds herself waking up as the villainess in her favorite novel "The Kingdom of Belmar". Knowing only death awaits her in the end, she spends her second chance tirelessly trying to change the course of her fate and survive the story. Things grow complicated as her life becomes intertwined with the main characters regardless. Love, career, and survival all become obstacles in her journey for a peaceful life, and soon, the story starts to change.

After both L and Light die, they are reincarnated into a new world. A parallel dimension where swords, guns, and spells are used in battle against mythical beasts. At first, L is hesitant about killing, but after realizing that his survival depends on it, he accepts using his guns. Light is completely against killing having noticing how childish his past beliefs of justice were, but hidden within him is Kira, and an instict to kill. When a mysterious genocide occurs in their area, L joins a group of local investigators to find out who was behind the killings and sees that Light had joined as well. (I assure you, it is L x Light)