Unlike many schools, attending Hyakkaou Private Academy prepares students for their time in the real world. Since many of the students are the children of the richest people in the world, the academy has its quirks that separate it from all the others. By day, it is a normal school, educating its pupils in history, languages, and the like. But at night, it turns into a gambling den, educating them in the art of dealing with money and manipulating people. Money is power; those who come out on top in the games stand at the top of the school. Yumeko Jabami, a seemingly naive and beautiful transfer student, is ready to try her hand at Hyakkaou's special curriculum. Unlike the rest, she doesn't play to win, but for the thrill of the gamble, and her borderline insane way of gambling might just bring too many new cards to the table. [Written by MAL Rewrite]

As Yumeko Jabami's fame grows and the reputation of the student council dwindles, Kirari Momobami decides to revolutionize the group. To this end, she announces an election for its next president. The rules are simple: each student in the school receives one chip. Whoever has the most chips by the end of thirty days becomes both the new president and the head of the Momobami clan. Upon receiving news of this development, the Momobami branch families spring into action. Eleven transfer students arrive at Hyakkao Private Academy, each aiming to lead both the school and the Momobami clan. Equipped with unique talents, they will compete to get as many chips as possible—but their chips are not the only things on the line. [Written by MAL Rewrite]

Silent, apathetic, yet mischievous, 14-year-old Rokujou Miharu is the bearer of the hijutsu, "Shinrabanshou," a powerful technique many ninja clans desire to possess to become the ruler of Nabari. Fellow classmate Kouichi and his English teacher Kumohira are both secretly Banten clan ninjas, pledging themselves to protect Miharu from his many attackers. Keeping apathetic, Miharu attempts to reject their invitation to join their ninja "club." However, after numerous attacks, he finds no choice but to join their group as a means for his survival. Slowly, Miharu takes a step closer to becoming the ruler of Nabari. [Written by MAL Rewrite]

Nike was a simple boy from Boering Village, and the last thing he ever wanted was to become a hero. But when a sign appears from the king of Ainshent Castle Town recruiting heroes to slay the Demon Lord Giri, Nike's father enthusiastically forces him out the door. Along with Kukuri, a member of the Migu Migu Clan, Nike sets out on an adventure to become the legendary hero that the world needs. As Nike and Kukuri travel across different continents, they attempt to learn the secrets of Guru Guru Magic, a strange but powerful type of magic used to seal Demon Lord Giri's power. While reluctantly taking on their assigned quest, the duo does not fail to acquire new comrades and have fun along the way. [Written by MAL Rewrite]