One day, Yuzuki is enveloped by a mysterious light and taken to an unfamiliar world. It is a world like that of the Sengoku Period, where warlords are fighting for domination. In the midst of the chaos, Yuzuki encounters a warlord named Hideyoshi Toyotomi. Hideyoshi commands the Toyotomi Army, and, along with his retainers, Hanbee Takenaka, Kanbee Kuroda, Toshiie Maeda, and Mitsunari Ishida, fights for the unification of this world at war. This world is known as Shinga, where non-human Gegga Tribes fight against one another.
They are, after all, our destined enemy.
.إنّهم عدوّنا المحتّم في نهاية المطاف
Sie sind unsere vom
Schicksal gesandten Feinde.
A fin de cuentas, son nuestros enemigos.
A fin de cuentas, son nuestros enemigos.
Ce sont nos ennemis jurés.
Perché eravamo predestinati 
a essere avversari.
Afinal, eles são
nossos inimigos predestinados.
Ведь они — тот враг,
что назначен нам судьбой.