Jikuu Tantei DD2 - Hangyaku no Apsaras is the sequel to Ascii's Jikkuu Tantei, the game features again the vampire detective, but instead of a sequel the game takes place in 2231 (7 years before the first game story)

The game begins in 2231 in Bangalore Area (India) in the Apsaral Center building when a group of detectives (Raizou Narukami & Kaori Al -Rajil) were investigating a strange alien artifac but when they are investigating the artifac activate itselft and part of the building is destroyed (a dimensional distorsion bomb), to avoid an alien infestation the organization decide to throw a bomb at that part of the building and consider their agents as dead.

The game then continues to 2236 in Japan in the detective office of the game's main character (Raizou Narukami, that was one of the 2 agents that were consider dead in the explosion) when two young girls take him out, but soon things will not be as easy and he will have to investigate that case that happened 5 years ago.

[From psxdatacenter]