Guinea Pig: Mermaid in the Manhole (1988)

An artist dealing with the grief of his wife leaving him finds solace in painting the squalor of the sewer. He discovers a trapped mermaid, whom he brings home to heal. Her condition worsens, and she asks the artist to paint her before she dies.

Genres: Horror, Romance

Stars: Shigeru Saiki, Mari Somei, Go Riju, Masami Hisamoto, Tsuyoshi Toshishige