A cursed girl and a mysterious man join forces to hunt down an evil witch.

Yoshino’s engagement is far from a dream come true. Her grandfather, head of the largest yakuza group in Kansai, has arranged her marriage to Kirishima, grandson of the Miyama Clan leader, as part of a truce. To Yoshino’s surprise, Kirishima seems kind and charming for a yakuza member. But his warm facade only serves to mask a dark and dangerous truth.

Sosuke Kaburaya is a detective struggling to make ends meet. While on a case, he happens upon Sara da Odin, a princess from another world who wields magical powers. Sara quickly adjusts to modern Japanese life as Livia de Udis, a knight from Sara’s kingdom, arrives to find her. Soon enough, both Sara and Livia’s positivity begins to rub off on Sōsuke and the neighborhood’s cast of characters.

After his parents' death, Naoto cares for his sister Suzu while living with their aunt. A new transfer student, Satsuki, arrives at his school, bringing dark memories and secrets that threaten their life.

1910s, Japan. A town with mysterious black snow. Kodo Iwamoto, a student at a military school dedicated to studying the paranormal, is sent to investigate. There, he meets a boy who believes he’s sick, but Kodo recognizes the illness as something else: supernatural abilities. Kodo recruits the boy to the school and sets off across the country, chasing mysteries and searching for others like him.