A young man, with amnesia, finds himself in a foreign world where people with animal ears and tails live. But, being that this world has monsters, and isn’t a modern society, he finds himself reliant on his assumed guardian to survive.

The village is under attack by monsters called gigiri, small insects with nasty claws. Haku and Kuon go with a group of mercenaries to help wipe them out, but get more than they bargained for when they run into a boro-gigiri, a monster that's over 30 feet tall.

Haku and Kuon travel to the capital, but their journey is interrupted by a bandit attack.

Having reached the capital, Haku and gang look for work... but not before partying. That's when a girl named Nekone appears before them, and she's actually Ukon's little sister.

Haku's busy days of working hard in the mornings and afternoon and studying at night are wearing down his mind. However, his hard work pays off when he's finally given a vacation. With his freedom and a little money, he sets out to the capital.

The inn where Haku's staying, the Hakuroukaku, is known for its beautiful owner. She sends him a letter and invites him to a banquet. He goes, but...

The emperor of Yamato holds absolute loyalty from his subjects. And his daughter, Anju, has her birthday approaching. Hakuroukaku finds itself with a strange visitor. Kuon's eyes shine coldly at this selfish young girl.

A lone passenger ship set sail in the night fog. It turns out to be a hub for illegal gambling.

A messenger arrives at Yamato, claiming he's from a land beyond the eastern sea.

Anju is in love with Oshutoru, the royal general. But because she is the imperial princess, she can't fall in love like ordinary people do. Kuon and the others try their best to help her.

For his services in saving the princess, Haku is invited to the palace and given an audience with the emperor. He is gifted two girls who are called the Priestesses of Chains. But he doesn't realize the deep meaning they possess.

Yamato is threatened by a barbarian invasion from the north, but the town doesn't seem worried at all. The eight pillar generals mount a counterattack, and Haku finds himself dragged along.

The invading forces are taking Yamato citizens hostage and using them as front line troops against the Eight Pillar generals. Rurutie and Haku go on a dangerous mission behind enemy lines to release the hostages' loved ones.

The ancient power of the masks is brought down to bear on the invading Usuurussha armies. The armies are torn apart by the power of the Eight Pillar Generals, but is the cost to Yamato's own citizens too great?

After returning from the war, Haku is deeply depressed. The girls all offer him gifts to cheer him up, but it doesn't help. So all the men decide to have a massive banquet and drink together. It gets out of hand and everyone starts taking off their clothes..

The truth behind Haku's past is revealed. What is his connection to the emperor, and to the mysterious and powerful masks?

The Emperor has declared war on Tousukuru, and Haku is summoned to join the fight. Will Kuon be willing to fight against her homeland?

The war against Tousukuru is going poorly, and Haku is sent with reinforcements. Munechika turns to him to come up with a plan to break the stalemate.

Haku comes up with a brilliant plan to attack the fortress where the Tousukuru provisions are stored. But he's discovered by a general who's as powerful as his entire group combined!

The Emperor is dead, and now his daughter must take his place. But the Eight Pillar Generals have other ideas. She is poisoned and Oshutoru is blamed for the killing. Will Haku be able to make it in time?

The emperor is dead, and Anju has been poisoned. Oshutoru takes the blame for the crime. Haku mounts a daring plan to rescue him.

The chase is on as Haku attempts to smuggle Oshutoru and Anju from the capital. But will he be able to flee the combined might of the eight pillar generals?

The race is on to escape the capital as the rest of the Eight Pillar Generals seek Oshutoru's death. Burai corners Haku and his friends, and the only way to survive is for a wounded Oshutoru to use the power of his cursed mask.

The princess and the rest of the group have successfully fled to Enna-Kamui to ready themselves for the coming civil war. Oshutoru and Nekone arrive later, bearing bad news: Haku is dead.