Two Of A Kind

After being friends for years, Finn and Marceline tell each other how they feel and begin dating. After messing around with magic crystals, they end up in Gotham where they meet and befriend Batman. Meanwhile, Two-Face plans to blow up half of both Gotham and Ooo so they see the world like he does. With their homes in danger, Batman teams up with Finn and Marcy to stop Two-Face.