Hyakkaou Private Academy. An institution for the privileged with a very peculiar curriculum. You see, when you’re the sons and daughters of the wealthiest of the wealthy, it’s not athletic prowess or book smarts that keep you ahead. It’s reading your opponent, the art of the deal. What better way to hone those skills than with a rigorous curriculum of gambling? At Hyakkaou Private Academy, the winners live like kings, and the losers are put through the wringer. But when Yumeko Jabami enrolls, she’s gonna teach these kids what a high roller really looks like!

Leon, who has succeeded the name of Golden Knight “GARO,” devotes himself to train a young Makai Knight for the next generation, together with Prince Alfonso of the Valiante Kingdom. Then, they receive an order to exterminate the most beautiful Horror in the world which resides in a neighboring country “Vazelia.” At the same time, a young Makai Knight for the next generation is kidnapped by an unknown person. Leon desperately follows them, only to find that he is surrounded by his enemies at a dead end. Then, a Makai Knight Dario who was supposed to be missing for some time suddenly appears and rescues him. Under his guidance, Leon is led to the town where he meets up a totally unexpected person.