Leaving the squid-worshipping village behind them, Tachibana and Jinguuji head for the royal capital. Shen, a suspicious-seeming trader they met in the village, accompanies them. On the road, the trader's motives for following Jinguuji are revealed. The group arrives in the royal capital, Ishurna, thanks to Shen's guidance, and heads for the temple of the Goddess of Love and Beauty to gather information on the Demon Lord, but once there, an unbelievable sight unfolds before them.

Guided by Mouria of Ishurna's Intelligence Department, Tachibana and Jinguuji are granted an audience with the king. Thanks to Tachibana's Charm, the two gain the king's support. Then, Tachibana and Jinguuji end up having a falling out in the middle of a banquet. After ducking out of the hall, Tachibana meets a beautiful young woman who meets his every ideal, but the encounter gets him wrapped up in a huge uproar.

Under the leadership of Ygraine, King Ishurna's daughter, the people have turned into a mob. Tachibana has joined the rebel army after being swept up in everything by Ygraine, Meanwhile, the shadow of the Demon King's army sneaks in, unnoticed. At the same time, Schwartz and Lucius, who have been called in by the king to gain control over the rebel army, head out to intercept the mob closing in on the royal capital, but...

In an ultimate final battle, Jinguuji must face his best friend and companion, Tachibana, who, under the influence of evil forces, controls a giant battle robot and threatens to destroy the entire kingdom! But before Tachibana can regain his senses, Jinguuji must first conquer his own personal inner demon...