Oars is a city built around a celestial fountain, where four distinct races coexist, united by a shared faith in Oceanos, the God of Rivers. Within this tranquil and enigmatic sky utopia, diverse civilizations flourish in harmony. However, amidst this era of prosperity, the threat of malevolent forces looms large. In response, courageous adventurers have established the Adventurer's Guild, ushering in not only advanced technologies but also ensuring the populace lives under the protective blessings of the Titans. These adventurers, selecting classes based on their racial strengths, undertake quests for substantial rewards, safeguarding the city's peace. Annually, the grand Adventurer's Arena convenes to identify the most formidable individuals from each class, honoring them as the Kings of Heroes, capable of combating the dreaded dragons and defending Oars from invasion throughout the ages. Yet, one fateful day, the denizens of Oars are startled by the ominous sound of the sky...