Mugen Shinshi: Bouken Katsugeki-hen
English name: Dream Dimension Gentleman
Genres: Fantasy, Horror, Mystery
Type: OVA, Episodes: 1
Aired: Feb 21, 1987
Studio: Gallop
Source: Manga
Rating: PG-13 - Teens 13 or older
Synopsis:
When a strange group of men attempt to kidnap Atsuko Fukune, a dancer at a club, she seeks the help of Mamiya Mugen, a famous detective - who also happens to be a child. When it turns out that other girls have gone missing, Mamiya, with the help of his butler Alucard, springs into action to solve the mystery.

(Source: ANN)