うたえ! エーリンナ [Utae! Erinna]

A short-lived 2018 series from Kōdansha, Utae! Erinna exists as a single-issue comic, its premise and scope defined solely by that solitary publication. The series is associated with the publisher's lineup of the era, though no specific creator is credited in the available facts. Its significance lies in its existence as a complete, contained work, offering a unique snapshot of a story told in a single chapter.