Attack on Guyver

"A story? Well, okay. How shall I start it? Hmm…How about, once upon a time- Bleh, no, that's such a cliché. Uh…In the beginning- Oh no, if I start there, you'll fall asleep before the story truly starts! Oh, wait, I know! How about I start this story on the day everything changed…" Crossover AU, multiple pairings. (Rewrite of Attack On Titan: The Warriors of Light and Darkness)