man, this game was like, 3 minutes. I have no idea what is this story even about
It is about a woman and her ex-girlfriend. They were together at one point, but broke up due to incompatibility. The protagonist still had feelings for her (and was also insane), so she felt she had to kill her by making it look like a suicide (throwing her off a building).
It is meant to be misleading at the beginning, as it seems as if she were about to commit suicide.