The Kingdom of Gstatt is guarded by seven gifted warriors who possess powerful "dragon tools" and fight bravely on the battlefield, making the enemies terrified. Tigre (voiced by Kaito Ishikawa) is a young nobleman from the Kingdom of Brune. During the war between the Kingdom of Brune and the Kingdom of Gstatt, Tigre met Ellie (voiced by Haruka Tomatsu), one of the seven warriors. Although Tigre's excellent archery skills impressed Ellie, he still lost to Ellie. What Tigre didn't expect was that Ellie actually took him to the Kingdom of Gstatt, where Tigre met the other six warriors. The dedicated Lyudmila (voiced by Ise Mariya), the tender Sofia (voiced by Kayano Ai), the calm Alexandra (voiced by Komatsu Mikako), the rebellious Elizabeth (voiced by Kobayashi Yu), the frail Valentina (voiced by Harada Hitomi), and the smart little Oruka, what kind of story awaits Tigre surrounded by these brave and skilled warriors?