In a small fishing village, a gloomy middle school student named Kai meets a mermaid named Lu.

Shota Shimodaas Kai Ashimoto (voice)
Soma Saitoas Kuniko (voice)
Minako Kotobukias Yuuho Ebina (voice)
Kanon Tanias Lu (voice)
Akira Emotoas Ashimoto's Grandfather (voice)
Shizuka Itohas Isaki (voice)
Kenichi Suzumuraas Teruo Ashimoto (voice)
Tokuyoshi Kawashimaas Fuguda (voice)
Choas Ebina's Father (voice)
Takayuki Sugoas Ebina's Grandfather (voice)