Binan City is located in Japan's northern Kanto region... The "Earth Defense Group (lol)" at Binan High School was, as usual, a club that did nothing. Kyoutarou Shuzenji, Ryouma Kirishima, Nanao Wakura, Taishi Manza, and Ichiro Dogou of the club casually sipped tea while engaging in meaningless chats. They've all congregated in Kurotama Bath after school. When Ryouma drags Kyoutarou Shuzenji by the arm out of the water, which he complains feels too wonderful, a gorgeous lad in weird garb joins him. These five youngsters are subsequently lured into a war for the heir to Honila Land's mythical realm...