Back Together is a Weiß Schwarz card from Disgaea DG/EN-S03-E127. Compare listings from Singapore Weiß Schwarz sellers on CardJio, then jio them on WhatsApp.
Choose a climax in your opponent's waiting room, and return it to his or her deck. If you do, shuffle your opponent's deck, choose a character in your waiting room, and return it to your hand.