Kosuke Ueki has been given the power to change trash into trees for the battle to decide who would be the next King of the Celesial World. But if Ueki were to attack non-power users with his trees, then he will be punished by losing one of his talents. If all of Ueki's talents are gone, he will vanish.

With another win and another zai under his belt, Ueki is able to relax for a little bit. When traveling by train one day, he meets Junichi Baba a.k.a. B.J., a hip-hop enthusiast who takes an immediate liking to Ueki. So why does he also say his name is Robert Haydn when he discovers that Ueki is also a gifted? Fortunately, B.J.'s ability to turn coins into wind is not enough to stop Ueki. The two part on friendly terms, but when the real Robert Haydn shows up, what will happen to Ueki’s new friend?

Mr. K sacrifices himself to save Ueki from certain death.

Ueki's fight with Kuro Kage comes to an abrupt end when Kamui Rosso (a.k.a. Shiro Kage) takes out Kuro Kage. Ueki defeats Shiro Kage and is then asked to join Robert's Ten. For some reason, Ueki accepts.

Robert has Ueki peform an entry test for him to pass if Ueki wants to join the Ten. Ueki then picks a fight with one of Robert's Ten, Allegio Yuriano. Mr. K discovers the truth about Ueki and Robert.

A large Heavenly Beast appears during the fight between Ueki and Aleggio. Ueki learns more about his potential powers as a Heavenly Being from the Beast, who befriends Ueki.

Ueki tells the rest of Robert's Ten (except Robert himself) that he defeated Aleggio. As a result, the Ten's Don decides to fight Ueki. Using his power to change his finger ring into a rocket, Don soundly defeats Ueki. In order to get stronger, Tenka has Ueki train in the Awakening Organ so that Ueki can raise his Heavenly-Being rank.

Now a 4-star Heavenly being, Ueki easily defeats Don in their rematch. Word about this gets out to the rest of Robert's Ten, including Marco Mardini and Rinko Jerad, whose sad past is revealed.

Ueki battles Myoujin, the last of Robert's Ten. Myoujin uses his two powers to overwhelm Ueki.

Ueki recieves an invitation to a "party" held by Robert Haydn. So, Ueki, Rinko, Inumaru and Mori all go to an arcade that leads to Robert's underground theme park called Dogura Mansion. There, Ueki fights in the first round against Yun-Pao, one of the new members of Robert's Ten.

Ueki continues his battle with Yun-Pao, still trying to figure out Yun-Pao's limit. Later, in the next fight, Mori finds herself battling on the Cossack Field against Kabara, a member of Robert's 10 and a notorious hunter known in the underworld.

It's Rinko vs. Kabara, and they fight in the...cat field? The objective is to get the opponent to get eaten by a cat, and to do that, they have to turn into a mouse! Slap the cat's nose and they become a mouse! Kabara seems to have the advantage in this one thanks to his ability to fly, but Rinko has a few tricks up her sleeves: some new weapons and a...love of animals?

Ueki battles against Sano on the Rope-Jumping Field. The real reason why Sano joined Robert's Ten is revealed.

Sano joined the ten for a very specific reason: to rescue Inumaru from a devious attack by Karl Paccho. Using a Death Pentagon, an insect that can instantly kill a heavenly being, Karl forced Sano to join or watch his God Candidate die. But Inumaru's sense of justice won't stand for these conditions. He breaks the cardinal rule of this tournament: a God Candidate can only grant powers to one individual. When he gives Mori powers of her own, he is instantly sent to Hell, freeing Sano of the Ten's grasp. Of course this only serves to infuriate Ueki even more. With a challenge made to Karl Paccho, a new fight begins. But Karl has a surprise: his talent is to copy the power of other gifted. With all the power of Robert's Ten at his disposal, Ueki is in for a tough fight.

Ueki continues his fight with Karlpaccho, who has more tricks up his sleeve. An event from Robert Haydn's past is revealed.

After Robert's past is revealed, Ueki begins his battle against Robert.

The battle between Ueki and Robert reaches its climax!

Ueki meets a new enemy named Anon, who is even more twisted than Robert Haydn ever was.

Mori faces Memory all by herself. Still unsure of her power, she tries to bluff for time while waiting for her teammates. Unfortunately, Sano can't hear her cries for help and Ueki just passed out! Left on her own, Mori can only run away from the battle experienced Memory. Mori tries desperately to solve the mystery of her power, trying out every idea that pops in her head…

Ueki was able to beat Anon using Maoh. They went back to school and Sano studied geography to make and Rinko dumped Robert. Kobasen became Ueki's new homeroom teacher and the talent he wrote on the blank zai was "reunion".