Satsujin Kippu wa Heart-iro
Japanese title: 殺人切符はハート色
Alternative titles: Heart-coloured Killer Ticket
Type: OVA
Source: Novel
Episodes: 1
Status: Finished Airing
Aired: Feb 3, 1990
Duration: 51 min
Rating: R+ - Mild Nudity
Studios: Deck
Producers: Creative Bridge, Nihon Eizo
Genres: Mystery
Demographics: Shoujo

A detective story about a murder on a train based on a series of young-adult novels for women by Yamaura Hiroyasu. Seiko, while suspended from school (she has been bullied) goes to Nagasaki, where she finds herself involved in a murder mystery. 

(Source: Shoujo &amp; General Weblog)