Beat the game and create a cleared save file and the New Game+ option will become available. In New Game+ you retain Raidou's current rank and total Loyalty, Number of tubes (max of 20), unlocked fusion restrictions, Number of fusions recorded, Compendium contents (demon can be summoned regardless of Raidou's current level), Special deals from Konnou-Ya, Mahjong, Case File complete percentage, Cleared alignments, Time played and number.