Season 1
An Orb, known only as It, is cast to Earth to be observed from afar. Capable of changing forms from beings whose reflections It captures, It first becomes a rock and then, due to the rising temperature, moss. It does not move until one snowy day, a wolf at death's door barely crosses by. When It takes the animal's form, It attains awareness of its consciousness and starts to wander with an unclear destination in mind. Soon, It comes across the wolf's master—a young boy waiting for his tribe to return from a paradise abundant with fish and fruit in the south. Though lonely, the boy still hopes his loved ones remember him and that he’ll reunite with them someday. The boy leaves home with It to find paradise using his tribe’s traces. However, with a heavily injured body and no sight of his elder comrades, what will become of the boy? To Your Eternity illustrates the story of an immortal being experiencing humanity, meeting all types of people in many places throughout time.
The Last One
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.
A Rambunctious Girl
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.
A Small Evolution
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.
A Large Vessel
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.
Those Who Follow
Fushi, March and Parona continue their escape from Yanome and back to Ninanna. Hayase chases after them, especially in order to capture Fushi.
Our Goals
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.
The Boy Who Wants to Change
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.
Monster Brothers
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.
Deep Memories
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.
New Family
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.
Gift From the Past
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.
Awakening
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.
Aspiring to Go Higher
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.
Jananda, Island of Freedom
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.
A Girl Named Tonari
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.
The Children's Dreams
Fushi just barely manages to take down the Nokkers. He opens up to the others, and they discuss their dreams and pasts.
The Defeated
Having defeated Fushi, Hayase makes a surprising proposal to the people of the island of Jananda.
To Continue On
Tonari returns to Jananda to rescue Fushi. Before setting out again, they stay the night in a cave, and Tonari shares her past.
Wandering Rage
Fushi, Tonari and their friends fight the Nokkers, who have taken over corpses.
Echoes
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.