To celebrate the 15th anniversary of Maple Story, the Maple Story Art balloon project was held in the Jamsil Lotte World Mall Arena. Eleven Monsters' Art balloon, which is famous for Maple Story, including "Yeti", "Pepe", "Pink bean", "Orange Mushroom", "horny mushrooms" and "Slime," have appeared to decorate Lotte World Mall Arena. In addition, photo spots, along with unique exhibits such as Pink bean Bus and Monster Parasol, were displayed to provide a variety of attractions. After 6 p.m., the lights were lit at night to create a unique atmosphere. With the long-loved MapleStory's popular monsters appearing outside of the game, adults can experience the same childhood that adults have forgotten, and children can experience a realized fantasy. Visitors to Lotte World Mall can have a good time with the monsters of Maple Story.