DOR

There is a door in front of you... A strange door, which has been created by the Devil. On the other side of it, three different worlds await you. Don't be scared, but don't get caught up in the realms of fantasy! The Devil is waiting to lead you along...

Kanako's Depression
You don't have a girlfriend, and you don't have any money either. You're moping around in your apartment, when a girl suddenly shows up at your door. Her name is Kanako; she's a timid little thing, but wait until you find out what she really is...!

The Telephone Scandal
You want to have a girlfriend. You call a dating service and guess what!? You get a girl and go out on a date. Wait a minute... Is this girl...?

[From G-Collections]

Planetarium
The scenario depicts a meeting between the male protagonist and a mysterious young woman near a giant observatory telescope. The hero finds out about the woman's tragic past and proceeds to "console" her.

[Edited from Moby Games]