In this AU, Mark and Sean are gems (like in Steven Universe). They are supposed to hate each other, and feel that way until they finally come face to face in a battle.
Might contain light fluff
If I was in this story I would just be watching this fangirling, saying, "Oh my god, yay!!!"
Everyone: -yelling mark-
Jack: wow this felix guy is cool
Mark:......'I'm in love with an idiot '
I will be the person to trip and fall in a life or death situation