The Sovereign’s Seal is a powerful yet dangerous weapon, protected and passed down through generations in the Riku house. Now that it has been stolen and used in a battle between the Kingdoms of Go and Gi, no one can rest without fear of a war. And so, the last descendant of Riku family, Rikuson Hakugen – chosen by the Seal to be the Crimson Warrior – abandons his beloved master Koumei to become a servant of Go. However, the situation becomes complicated when the Seal is stolen again, leaving Rikuson confused and uncertain about the path he is to follow. But in a war there is no time for hesitation. Will Rikuson be able to create his own destiny and, more importantly, stop the Seal’s power before it’s too late?
It is the era of Bakumatsu – the last years of the shogunate. In the general turmoil caused by warring groups with different political interests, a curious theatrical group known as the Yuyama Troupe is set out for revenge. They come across a mysterious young swordsman, Akizuki Youjirou, who seems to be burdened with a dark past. Thrown around by currents of history, powerful people from different factions and personal relations, Akizuki tries to fulfill his mission to destroy an ancient, cursed relic, the Lord’s Head, which has caused chaos and bloodshed for thousands of years.
Both series are about an artifact which grants power to its user, however, the same power might corrupt its user. The main characters both wield swords to safeguard the peace in the world. Also, a question in both series is, who can be trusted?