Shimazu Toyohisa aims for the head of the enemy general in the retreat battle "Shimazu's retreat" and "Sutegama" that breaks through the enemy lines!! Between life and death, a door to another world opens... Sometime not now, somewhere not in reality, the strongest samurai of the Warring States period is summoned to a new world of war! Now, a new world drawn by the extraordinary Hirano Kouta unfolds...