An orb is tossed upon the earth. It transforms to match its surrounding environment: first a rock, then moss, then a dying wolf. The wolf returns to its last remaining family, a boy living alone in a small home in the snow.

The orb, having morphed into a boy, finds its way to Ninanna, where he is attacked. He is discovered by a girl, March, who may not achieve her goal of becoming a grown-up.

March is escorted to the altar to be sacrificed to Oniguma. Along the way, she tends to Fushi, who, despite having the body of a young man, doesn’t seem to have the mind of one.

Hayase, interested in Fushi’s inability to die, brings him along with March, Parona and Pioran to the nation of Yanome. They are shown around town and treated well, but things are not as they seem.

Fushi, March and Parona continue their escape from Yanome and back to Ninanna. Hayase chases after them, especially in order to capture Fushi.

Having gained a semblance of humanity, Fushi sets off on his own. He encounters Pioran again, who teachers him words and writing, helping him live as a human being.

Fushi and Pioran arrive at Takunaha, where they meet Booze Man and a boy named Gugu. Gugu, who had been living with Booze Man for several months following an accident, warms up to Fushi.

Fushi explains to Gugu how his form as the wolf, Joaan, and March, came to be. Gugu explains death to Fushi. Together, they come to understand the meaning of family.

Fushi tells Gugu about the wolf, Joaan, and the boy he took on the form of. Gugu explains death to Fushi, recalling his own past, working for a wealthy family with his brother.

Fushi and Gugu fight against the Nokkers that they encountered in the forest. Though the situation is grim, Gugu has a trick up his sleeve.

Four years after their encounter with the Nokkers, Fushi and Gugu have grown into fine young men. They’re invited to Rean’s birthday party after a brief reunion with Gugu’s brother.

Just as Gugu and Rean come to understand each other, the Nokkers emerge, causing panic in the party hall. Fushi and Gugu are forced to fight.

Fushi leaves Booze Man’s home and sets out to wander aimlessly around Takunaha. He has many questions for the Observer, but can’t seem to get any straight answers.

Fushi and Pioran are separated on the prison island of Jananda. He enters a tournament where, if he survives until the end, he will be granted the right to do anything he wants – including leaving the island with Pioran.

Fushi transforms into Parona of Ninannah in the middle of the tournament. He is shocked when he realizes what this implies. Meanwhile, Tonari, desperate to have Fushi join her and her friends, offers to help rescue Pioran.

Fushi just barely manages to take down the Nokkers. He opens up to the others, and they discuss their dreams and pasts.

Having defeated Fushi, Hayase makes a surprising proposal to the people of the island of Jananda.

Tonari returns to Jananda to rescue Fushi. Before setting out again, they stay the night in a cave, and Tonari shares her past.

Fushi, Tonari and their friends fight the Nokkers, who have taken over corpses.

Fushi parts ways with Tonari and heads to the port where Pioran is waiting for him. He worries that he may attract the Nokkers again and endanger her.

Fushi, having spent several decades alone on an island, learns that a village was attacked by the Nokkers.

Things do not go well when Tonari tries to remove the Nokker from Hisame's arm.

Kahaku, the sixth of Hayase's descendants, introduces himself to Fushi. Much time has passed, and the Guardians have expanded their influence.

Fushi must stay on the move in order to keep the Nokkers from attacking, so Prince Bon accompanies him out of the castle town.

Fushi, along with Kahaku, Bon and Bon's army, travel through several towns, spreading word of the Nokkers along the way.

Kahaku asks Fushi to marry him. He seems confident that they can overcome the complications of Fushi being a shape-shifting immortal, but Fushi isn’t. Cylira returns.

Fushi attempts to escape from his iron cell, while Bon and Todo await their trial in their own cells.

The Kingdom of Ularis, along with Fushi, Todo, Bon's family, and Baron Spring Roll, prepare for life without Bon.

As warned by Kahaku’s arm, the Nokkers attack the head church of the Church of Bennett, causing terrible devastation.

Fushi trains his senses in preparation for the Nokkers’ attack on Renril. He discovers a strange girl in a circus tent.

Having finished training on the derelict ship, Fushi travels to Renril, where the Nokkers are threatening to attack.

Fushi and his allies work to win over the trust of the people of Renril in preparation for the Nokkers’ attack.

The team works to prevent the Nokkers from making use of the waterways and sewers. Fushi works non-stop rebuilding all the homes, and the exhaustion begins to show.

The city of Renril bands together around Fushi in preparation for the Nokkers’ attack. The princess introduces him to her father, King Boldron of Sonia.

Fushi fends off the Nokkers miles away from Renril, but the Nokkers had already devised a more cunning plan.

The death of his three friends turns Fushi mad, and he begins defeating the Nokkers at a furious pace. But as it turns out, he may not be the only immortal.

Amidst the brutal battle against the Nokkers, Bon and Kahaku both share a desire to protect Fushi’s humanity. How they go about it, however, puts them at odds.

March begins her desperate search for Fushi, whose absence has led to the city being overrun by the Nokkers.

In the beginning, it was an orb. And Fushi was an orb once again. But though there was no certainty, there was hope.

With the Nokkers defeated, the people of Renril rejoice, and Fushi and his friends discuss their hopes for the future.

Fushi awakens in a world where peace reigns. What new and old encounters await him?

Fushi begins his new life in the present day and begins to gather his former classmates at Yuki's house.

Mizuha is fed up with her everyday life and decides to run away.

Fushi takes care of a troubled Mizuha.

Fushi and his revived friends joins Yuki and Mizuha at school.

Fushi struggles to maintain the peace between Tonari and Mizuha.

The mystery of the Nokker inside Mimori is clarified a little, as it seeks Fushi at the school to attack him.

Hirotoshi reveals Mimori's deeply troubled past.

Fushi and Bon try to save Mimori at Hirotoshi's request, but a new Nokker appears.

Rikuya is found destroyed. The Nokkers confront Fushi.

Fushi has an opportunity to deal with the Nokker in Izumi's body.