A sequel to the original game
which retains the two protagonists, but otherwise is just thematically similar. This time, there's quite a lead-in until people get turned into zombies. It's all basic japanese adventure game stuff, although there is a "combat" system where you have to click the right area before the time runs out. Death is just a slap on the wrist and a retry though.
There's a brief overview of this game over on MobyGames