Nobunaga and his army, marching westward as they attempt to unify Musha World, have decided to recharge their energy at Honnoji as an early celebration. Suddenly Mitsuhide, who was supposed to be his subordinate, launches a rebellion at the head of a mysterious masked army, and sets fire to Honnoji. Gradually beaten back, Nobunaga is facing defeat, and begins to dance as he recites a farewell poem. Just as he finishes his poem, a mysterious figure appears. In its hand is a mask like those of the mysterious army.
—Gundam.Fandom