Odette and Cordelia are seal sisters with the magic to transform into a human. The younger sister, Odette, explores the human world with a bright and curious heart. But Cordelia, the older sister, is her polar opposite. A painful past encounter with humans has left her wanting nothing to do with them. One day, the sisters get caught up in a dangerous seal-hunting incident. Just as all seems lost, they are saved by Rudolph, the heir to a powerful dukedom. Though Cordelia tries to keep her distance, Rudolph finds himself strangely drawn to her. Can a forbidden love between a human duke and a seal princess ever work? Cordelia's guarded heart begins to soften as they are drawn together

The moment I blew out the candles on my 7th birthday cake— I realized I had reincarnated into the world of a novel. And not just as anyone, but as the daughter of the main characters! The problem is… [The heroine ■ □ dies, and the male leads… cause the world to end?] So, in the side stories, my mother dies and my fathers cause the apocalypse? Is this for real…? ‘No way. I’ll stop it no matter what!’ I’m a brave seven-year-old now! So, I set out to lead my fathers and twist the original story by any means possible. “You know what? You and I are destined to fall in love someday.” I’m busy enough trying to save my mother, so who the heck are you? After successfully twisting the original plot, I was planning to finally enjoy my youth, but — “A son-in-law? Sure. I’ll accept anyone, as long as they meet one condition.” “What condition?” “They have to fight us and win.” “Whatever the reason, any guy who lays a hand on my daughter is as good as dead.” It seems my fathers have no intention of living peacefully. “That’s easy. Just tell them to come at me all at once.” Why are you agreeing to that so casually?!

Ritsuka Uenoyama is bored with it all—with school, with his basketball club, and even with his one true passion: playing guitar. Until the day he finds his favorite hidden napping spot occupied by a strange boy cradling a broken-stringed guitar. At first, Uenoyama is nonplussed by Mafuyu Sato and his slightly odd behavior, but when, on a whim, he asks the other boy to sing, the power of Mafuyu's voice pierces him to the core