Nexon America today announced a first-ever crossover event available on mobile MMORPG sensation MapleStory M. Based on the popular manga series published since 2014, Re:ZERO series regulars Subaru Natsuki, Emilia, Rem & Ram and Felt will join MapleStory for a special crossover event where players will be able to earn a range of MapleStory M X Re:ZERO themed rewards by completing events, collecting medals and visiting the special event Cash Shop.