So basically later in the story you are going to be singing songs with other creepypasta characters that correspond to that song. Example: "Murder!" Will go with Jeff the Killer. So, your song will be:
Insanity! Yes! It's literally called Insanity. Here it is:

[There should be a GIF or video here. Update the app now to see it.]

U can get the english version too:

[There should be a GIF or video here. Update the app now to see it.]

So yeah! This is your theme song. So, cya!
~CarDoodles