Umi no Yuyu was published as Ningyo ni Uso wa Tsukenai, a young-adult novel by Aze Handa. In a seaside town, a boy meets a mermaid who cannot return home, and the summer story unfolds around family absence, secrets, and danger.

A fresh seaside coming-of-age novel that begins with a stranded mermaid.

Shonen Yako Kitan is a work by Nio Yamabuki that received an encouragement prize from the Ichijinsha Bunko Award. It is confirmed in award records, but no standalone publication under this title could be verified.

A prize-recorded work with a fantastical title and no confirmed book publication.