Kaito Daimon, an average high schooler is a genius at solving puzzles. Apparently, Kaito went to did a table Puzzle route in his school for some "tests" which was referred on his Device. Soon later, h…

In his powerful state known as 'Phi-Brain', Kaito manages to solve the puzzle, allowing them both to escape the ruins. Later, Kaito becomes annoyed by a puzzle solver named Gammon Sakanoue, who carrie…

Kaito meets a boy genius solver named Cubic Galois, who carries the title of 'Edison' and prefers mathematics other puzzles. He attaches a strange bracelet onto Kaito's arm, which causes his head to h…

Kaito is given a Sage Puzzle to solve on the weekend, where he is to be partnered with Ana Gram, an art enthusiast who holds the title of 'Da Vinci'. They visit the mansion of a late artist, with its …

The POG extend an invitation to Kaito, who is accompanied by Nonoha and Gammon, to their headquarters. As the three make their way through the maze to meet with the POG's head, Kaito notices something…

Kaito is still tormented by his memories and unable to solve puzzles. Cubic researches into the Orpheus bangle, theorizing Kaito's breakdown was a result of his brain power being completely controlled…

As Nonoha visits some kindergarten students, their teacher, Madoka, gives Kaito a letter, which the others suspect to be a love letter. Suspicious about the contents, Nonoha and Gammon follows Kaito t…

Kaito is contacted by Genius Okudera, a man he once saved from a ruin, who invites him, Nonoha and Ana to a puzzle-themed hotel resort in Hokkaido to solve an alleged Kenja Puzzle being displayed as t…

As Root Academy prepares for a cultural festival, where Kaito finds himself reluctantly entered into a crossdressing contest, the principal, Baron Kaidou, agrees to install a Kenja Puzzle within the a…

As Kaito dreams of appearing on a TV puzzle show hosted by Elena "Antoinette" Himekawa, Gammon, who had been Elena, jumps in to protect her when it looks like she is being cornered, though she is not …

Elena enlists the help of Kaito and his friends as extras in a new sentai show she is starring in. Later that night, Elena brings everyone together for a Kenja Puzzle in which they must construct a th…

Kaito is surprised to meet his childhood friend, Rook Banjou Crossfield, who unbeknownst to him is the head of POG Japan, and learns he is to become an exchange student at Crossfield Academy in Englan…

As Kaito pushes through the puzzle, believing Rook is in danger, Nonoha and the others decide to fly to England, learning the truth about Fool's Puzzles from Souji on the way. As Kaito reunites with R…

As Kaito remains unconscious in hospital, Cubic is invited by Rook to take on a puzzle and accepts it, wanting to prove his friendship to Kaito. He comes to an abandoned military base where a differen…

Kaito becomes angry when he notices Rook to have done something to Cubic. He and Nonoha go to one of Rook's old living quarters, where they learn of Rook's disturbing childhood. After hearing from Non…

With the planes back to Japan allegedly taken over by the POG, Kaito and the others travel to Venice instead. As Souji goes to see Rook concerning the Phi Brain project, Gammon deduces that their tran…

As Kaito and the others return to Japan, they find the principal, Baron Kaido, has gone missing. Later on, Kaito is summoned by the POG to the place where his parents died. As Kaito and the others arr…

Following the incident, Cubic and Ana start avoiding Kaito, believing they can no longer follow him, much to the dismay of Nonoha. Meanwhile, Gammon, who is contemplating whether he should become a Gi…

Kaito is visited by Gammon's little sister, Miharu, who is worried that she hasn't heard from Gammon. Meanwhile, Gammon arrives at the POG headquarters and is challenged by the Givers to earn the righ…

As Miharu has dinner with Nonoha, Kaito faces a deadly puzzle against Gammon, who seeks something known as The God Scrolls in order to complete the Puzzle of God. As Kaito nears the end of the puzzle,…

As Kaito experiences strange occurrences in which he loses focus of everything else when he glances at puzzles, Cubic reveals this is the result of Kaito's brain speed reaching abnormal levels, advisi…

After finding Jin a complete wreck, Baron explains to Gammon about how POG's leader, Count Pythagoras, intends to bring about a conflict between Kaito and Rook in order to open the gate to the Puzzle …

After Kaito's encounter with Rook, he goes to see Ana, whose drawings and paintings resemble his visions, explaining that the future is yet to be determined. The next day, Gammon challenges Kaito to a…

As the POG breaks apart following Rook's outburst, Kaito is contacted by Rook, who asks to spend some time with him in a surprisingly friendly manner. After a seemingly normal day of hanging out toget…

Rook presents a solar system based puzzle where, if Kaito reaches the Sun, Rook would fall to his death, with Rook simplifying the puzzle to make it easy for Kaito to solve. Kaito, looking for a way t…

While solving another Fool's Puzzle, Kaito spots a curious person watching him. The next day, Kaito discovers the school has been converted into a Fool's Puzzle that wasn't arranged by the POG. Findin…

Tamaki, who was given a strange earring by one of the Orpheus Order's members, Pinochle, challenges Kaito to a Judgment Puzzle in which he must navigate an ever-changing maze. Nonoha deduces that Tama…

While at the arcade, clumsy Puzzle Club member Airi Mizutani is approached by a member of the Orpheus Order, Mizerka, who gives her an Orpheus Ring. After putting it on, Airi suddenly becomes more int…

During the night, the members of the Orpheus Order meetup to receive a message from their leader, Klondike. Meanwhile, as Cubic deduces the recent Orpheus Rings are modernized replicas, Gammon discove…

Gammon's frustration concerning the Orpheus Order's attempt to target Miharu leads to a slump in the puzzles he makes under his pen name, Setsu Chidou. When he returns home that night, he finds Doubt …

The Orpheus Order show up at Root Academy, revealing themselves to be students of Crossfield Academy, and challenge Kaito and the others to a duel in which, if they win, they will take possession of K…

Kaito begins his match against Pinochle, who is able to predict Kaito's moves having studies his data, though Kaito manages to turn that aspect against him. Just then, Pinochle begins revealing things…

As Kaito has some alone time following his match, where he recalls more about his past, Ana talks with Nonoha about his sister, Eve, who helped cheer him up when he was down. As the game resumes, with…

As Freecell refuses to tell Kaito the truth about what happened to his mother, Gammon gets Hoist to combine the remaining two matches into a tag-team duel with Kaito and Gammon against Freecell and Do…

Following the battle against Orpheus Order, Elena transfers into Root Academy and takes the Phi Brain kids and their friends on a vacation on her private island, where puzzling is forbidden. However, …

With the vacation now fully puzzle focused, Nonoha feels like she has nothing to do. Wanting to spend more time with everyone, Nonoha decides to join in Elena's intense puzzle training. Although she s…

As Rook and Bishop investigate the Orpheus Order elsewhere, Souji expresses his desire to quit both the student council and the puzzle club. Meanwhile, Souji is contacted by Minotaur, who is revealed …

Souji sets up a sliding puzzle for Kaito, also threatening to blow up the academy should he fail. As Cubic, defiant that Souji hasn't changed, goes to search for said bomb to prove his theory, Nonoha …

Elena is told off by Tamaki after makes various 'improvements' to the school without permission. Meanwhile, former POG member Herbert Muller appears before the Orpheus Order, beating Doubt in a puzzle…

As Melancholy takes interest in a girl named Lotte and her intelligent dog named Rummy, Rook shows Kaito and the gang a newer Replica Ring model recovered from a manufacturing plant for Cubic to analy…

Ana is visited by his older sister, Eve, who is soon revealed to possess an Orpheus Bracelet, showing a drastic change from the kind-hearted personality that Ana admired and blaming him for having to …

Pinochle challenges Kaito to a puzzle, saying he will tell him everything about what happened between him and Freecell should he win. However, the loser will fall into a furnace. As Pinochle tells of …

After finding out the location of Orpheus Order's hideout from Pinochle, Kaito and the gang head there, where they are confronted by Herbert, who is wearing two rings. He challenges Kaito to puzzle in…

As Cubic works to help Gammon and Ana, Nonoha goes in search of Kaito and comes across Freecell. After some reluctance, Nonoha accepts Freecell's help in solving the puzzle blocking their way to where…

As the gang try to figure out more behind Klondike and the Replica Rings, Cubic reveals to Gammon that Kaito's brain patterns are still accelerating even without the Orpheus Bangle. Meanwhile Kaito, w…

Mizerka and Doubt are sent a password to access their confidential files, where they learn the truth about their rings. As Mizerka learns Melancholyhad been playing along with her the entire time, she…

Melancholy and Whist appear at the POG headquarters to deliver a message from Klondike challenging Kaito to a puzzle, revealing he has Freecell in his possession. As Kaito and Klondike prepare themsel…

Souji returns having been to Crossfield Academy where he retrieved a diary from someone who used to be in the Orpheus Order. It details how the Orpheus Order was changed when Klondike decided to have …

As Freecell becomes curious as to why Nonoha is present in a vision of him facing off against Kaito, Kaito and the others ponder why Freecell needed Klondike's Final Ring. The next day, Hoist abducts …

Kaito and Freecell begin the puzzle in which Kaito must use clues to chase down Freecell. As they constantly try to outwit each other, their brain levels increase and they soon start running in circle…

Whilst exploring a Sage's Puzzle in England with Jin in the hopes of recovering his memory, Kaito stumbles upon an unsolved puzzle, having assumed Jin had already solved all of them. Solving the puzzl…

Thanks to Kaito's deductions and Nonoha's memory, their group manages to find the correct exit and escape. Afterwards, Raetsel takes everyone to her personal boat, where she shows them a feed of Gammo…

As Raetsel transfers into Root Academy, Gammon spots Jin behaving rather oddly, uncertain whether or not to believe either Kaito or Ratesel. Later, a Master Brain posing as Jin appears before Kaito, c…

Whilst Kaito is having a picnic with Jin and Nonoha, Raetsel appears before Kaito, stating that the Fools' Puzzles made Jin suffer, clashing with Kaito's own memories of him. However, Nonoha helps the…

Rook calls Kaito and Raetsel together, telling them about a time he had a talk with Jin, who told him a cryptic message about puzzles being both 'chains' and 'mirrors', which he had also told Raetsel.…

Elena, who had just come back from abroad, becomes curious about Raetsel and decides to hold a welcoming party for her to find out more about her. This attracts the interest of Ana, Airi and Tamaki, w…

Rook informs Kaito that Jin had previously made some Fool's Puzzles, which he himself destroyed as a means to improve his Giver skills, theorising that he may have been under influence from the Orpheu…

Freecell and Melancholy soon come to understand Kaito's message, allowing the four of them to reach a solution that allows everyone to escape alive. Afterwards, Melancholy invites everyone to her mans…

Baron, Souji, Rook, Bishop, Raetsel, and Jin are all called up to meet up with Enigma to discuss Jin. Enigma talks about how Jin first met Raetsel, noticing her skills in crafting puzzles, and took he…

Following a hint Raetsel left them, Kaito, Nonoha and Gammon travel to Texas, where they meet a girl named Nono and her brother, Joe, who is a skilled basketball player. Nono explains that Joe was sco…

With Kaito's group stuck between flights, Cubic and Ana go ahead of them to Rio de Janeiro, where they meet a woman named Regina Maria Vasco. Taking them to a hidden cave under the pretense of helping…

After discovering some puzzles in South America, along with a ring left behind by Raetsel, Kaito's group soon come up against Herbert, who has equipped himself with four replica rings. He challenges t…

Feeling that she somehow needs to prove herself to Jin, Raetsel decides to confront Kaito herself, challenging them to find Jin inside a Mayan pyramid. Meanwhile, Rook and FreeCell arrive at an Egypti…

Rook and FreeCell is tasked with helping each other get through the pyramid's maze using hieroglyphic gateways within ten minutes before they are locked inside forever. Whilst they quickly figure out …

While the Baron is revealing Jin's past and his ties to the fallen puzzler Lavoushka. Enigma shows up and reveals his past and his motives for having the puzzlers eliminated

Kaito and the others arrive at Raetsel and Jin's location, where Kaito and Nonoha decide to speak with Raetsel privately, telling her what they learned from Enigma. Raetsel states she had apparently f…

After Kaito, along with Raetsel, Rook, and Freecell, once again sees the vision of a ruined future, Orpheus demonstrates some of his power on Kaito, temporarily showing him an illusion where he failed…

Orpheus appears before Kaito and the others, showing each of them alternate versions of their past, including Kaito managing to save his parents and Freecell's mother never having the Orpheus Ring. He…

Whilst Kaito's group tackles the puzzle before them, Gammon and Elena meet up with Raetsel in Amigne, eventually coming face to face with Orpheus, who brings them to an illusionary Sage Puzzle with an…

Told by Orpheus that she won't be able to become a Phi-Brain as she is, Raetsel agrees to take on a Sage Puzzle in order to obtain an Orpheus Bracelet. Despite Jin's objections, Raetsel enters Orpheus…

As Souji, Cubic and Ana meet up with the Orpheus Order to learn what they can about Orpheus, Rook, who has received an Orpheus Bracelet from Orpheus, challenges Kaito to a puzzle in which they must ra…

Called together on a yacht by Enigma, Kaito, Gammon, Freecell, and Raetsel participate into a block-pusing maze puzzle to decide which two shall take on the Puzzle of God. Raetsel is the first to reac…

After Orpheus informs Kaito and Raetsel that they'll be facing the Puzzle of God the next day, Kaito tells Raetsel not to come as he doesn't want anymore casualties. As Kaito shuts himself away whilst…

As Kaito and Raetsel are shown their pasts, which change based on their hearts' desires, they overlap, showing a vision of Kaito joining Jin and Raetsel on their journey. Upon reaching a point where J…

As Raetsel challenges Kaito to face her in the Puzzle of God before Jin and Pythagoras, they are greeted by Nonoha who, in this timeline, had grew into a POG Solver. Her feelings that puzzles are solv…