If you liked the Confession (Kaiji KAWAGUCHI) manga, the Anime-Planet community thinks you'd like:
Two murder suspects are being transported aboard a train when a landslide suddenly occurs, derailing the train and allowing them the chance to escape. But long-time convict Shinpei handcuffs himself to the distraught pianist Susumu, and the fates of the two are bound together. With the police on their tails and the odds against them, what will happen to the unlikely pair?
The Blue Heaven is the greatest of luxury cruise liners, catering to its guests’ every need. While passing by a derelict fishing ship during a voyage, the Blue Heaven’s crew investigates, finding only two barely-alive survivors alongside a scene of murderous carnage. They are brought on board and treated, but one of the two men escapes custody, loses himself amongst the numerous passengers, and is confirmed the killer by the second survivor. With the ship thrown into chaos behind the scenes, can security forces find the madman before events escalate?
Confession and Blue Heaven are two psychological thrillers that will keep you turning the pages - that is, at least at first. Blue Heaven seriously deviates in its second volume, but fans of thrillers will definitely appreciate these two.