Darkness Within (SeptiPlier FanFic)

Jack is always looking for something entertaining to do. He has grown terribly bored with sitting at home and playing games. So he decides to go out. He happens upon a club and has begun to visit it regularly, although he doesn't quite know why. That's when Mark happens to appear in the club one night. An unexplained attraction has pulled the two together. As their friendship begins to flourish, feelings begin to arise and neither can explain why. But what happens when their darker sides begin to show themselves? How will they, and everyone close to them, react? Will they be able to push through and make things work, or is inevitable heartbreak in their future?