第 1 集: 大山大虎在魔劍決鬥與意外的情感糾葛中，展開了他的男女合校高中生活。

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Haruko Amaya accompanies longtime childhood friend Takeru Ooyama to his first day at Tenbi Academy, a private prep high school that converted from all-girls to co-ed. After Haruko excuses herself to prepare for the welcoming ceremony, Takeru wanders around outside to take in the view and witnesses a curious confrontation between two female students named Azuki Shinatsu and Garrett Kinua, who are later revealed to be settling a wager over a teddy bear. He also he has an embarrassing run-in with Kodama Himegami, who was watching the battle from a tree. At the welcoming ceremony, Takeru learns from principal and physical education teacher Minori Rokujou that fighting is a way of life for the students, in which they will be given an Element that they will need to master during their pursuit of obtaining one of the original eight crafted weapons called Maken. Kodama challenges Takeru to a duel, but this match is interrupted by Inaho Kushiya, who happily claims to be Takeru's fiancée. Takeru is later placed in the dormitory, where he ends up being roommates with Kodama and Inaho. However, a jealous Haruko decides to move in with them as well. (Source: Wikipedia)