Kohei actually does something when he finds out Erika is a vampire instead of spending five episodes asking questions and looking confused. The show drags through its middle like it's killing time, but the final quarter suddenly remembers it has a story to tell. By the end you understand why the isolation of that island and the weight of her secret mattered all along.
Kohei transfers to an elite academy perched on a remote island, a sprawling institution that blends junior and senior high under one roof. Cut off from the mainland by water, the school exists in its own bubble, insulated and strange. Within days of arrival, Kohei stumbles onto a secret that shatters his ordinary expectations: Sendo Erika, a girl from the neighboring class, is a vampire. Rather than danger, this discovery opens a door into something far more complicated. Erika isn't a threat to be feared but a person carrying her own burdens, navigating adolescence under the weight of an inhuman existence. Kohei finds himself drawn into her world, watching supernatural elements collide with the mundane chaos of high school life. Romance blooms alongside comedy, with the absurdity of hiding a vampire roommate amid school festivals and everyday drama. The series balances lighthearted moments with quieter beats of genuine connection, building a story about acceptance across impossible divides. What starts as a shocking revelation becomes something warmer: the chance to know someone completely, regardless of what they are.