Chapter Summaries

On the way back to the Hidden Mist Village, Mei Terumi struggled with her fear that Itachi Uchiha's Genjutsu could someday make her repeat the Fourth Mizukage's mistakes. Seiya reassured her by revealing a cache of powerful Sharingan, Hashirama Senju's cells, and Shisui Uchiha's Mangekyo Sharingan, leaving Mei stunned by what he had obtained.

• Mei Terumi fretted over being caught in Itachi Uchiha's Genjutsu and feared she might one day be controlled and harm her village like the Fourth Mizukage.
• Seiya realized that Mei's distress came from her heavy sense of responsibility and helped her back to her room after she drank too much.
• Seiya told Mei to stop worrying and revealed a severed arm bearing ten Three-Tomoe Sharingan.
• Mei asked where Seiya had gotten the Sharingan, and he said an old bastard had given them to him during his trip before the Konoha Crush Plan.
• Seiya showed Mei Hashirama Senju's cells and a Mangekyo Sharingan belonging to Shisui Uchiha, explaining that it contained Kotoamatsukami.

Seiya offered Mei Terumi Shisui Uchiha’s Sharingan or a plan to make her the Three-Tails Jinchuriki to protect her from Genjutsu, but Mei rejected both. After she kicked him out for missing her desire for comfort, Seiya went to sleep while Mei waited for him to understand.

• Seiya explained that Shisui Uchiha’s Kotoamatsukami could protect Mei Terumi from Genjutsu and suggested she transplant his Sharingan, but she refused because of its appearance, secrecy, and chakra drain.
• Seiya proposed using the Impure World Reincarnation to summon Yagura, then making Mei the Three-Tails Jinchuriki so Yagura could help her master Tailed Beast Transformation.
• Mei became angry when Seiya suggested splitting the Three-Tails, and she kicked him out of her room for bringing up body modifications instead of comforting her.
• Seiya returned to his bedding, confused by Mei’s reaction, while Mei stayed in her room waiting for him to understand what she wanted.

Mei Terumi reflected on Seiya’s genuine care for her and decided that getting him revived should become a priority. In the shared space, Kaguya Seiya met two new arrivals: a Victory Team aircraft mechanic from Tiga World and an ordinary high school detective from the world of the long-stuck elementary school Shinigami.

• Mei Terumi grumbled that Seiya was dense, then decided to make her hints more obvious while recognizing his trust and care for her.
• Mei Terumi resolved to prioritize reviving Seiya before their age gap grew any wider.
• Kaguya Seiya entered the shared space and met Tiga Seiya, a Victory Team trainee who maintained Flying Swallows and had unexpectedly been sent into battle.
• The gathered Seiyas shared memories and learned that the other newcomer was an ordinary high school student whose world included a Shinigami Elementary School Student.
• The high school student Seiya introduced himself as a third-year at Teitan High School and a struggling detective who took on many odd jobs.

After the Seiyas shared Tiga Seiya’s scientific expertise, Yu-Gi-Oh! Seiya realized he could recreate a Virtual World Seed and use it to enter the Real World. He headed toward Domino City during Kaiba’s Duel City tournament, where duelists battled for Puzzle Cards and Rare Cards.

• Tiga Seiya used his research skills to break down Sword Art Online Seiya’s Virtual World Seed into digital code.
• Seiya the Snowballmon and Seiya the Kuriboh became excited about combining the Virtual World Seed with their worlds’ data and research capabilities.
• Yu-Gi-Oh! Seiya returned from the Mind Dream Space and decided his new strength meant he could safely visit the Real World.
• The chapter described Kaiba’s Duel City tournament, its Puzzle Card requirements, and its rule that duelists wagered Rare Cards.

Kuriboh Seiya searched Domino City for a duelist worthy of becoming his Spirit Partner and chose Mai after watching her win a duel. As the Real World's rejection of him grew stronger, Seiya gave Mai two powerful Harpie cards and hoped they would bring her luck.

• Seiya found the duelists in Domino City too weak to serve as suitable partners.
• Mai defeated a middle-aged duelist with Harpie Lady and claimed his rare card and Puzzle Card.
• Seiya approached Mai and praised her skill, but she mistook him for someone trying to flirt with her.
• Seiya handed Mai Harpie Queen and Harpie's Pet Baby Dragon before the Real World could reject him further.

Mai received two powerful Harpie cards from a mysterious boy who vanished before she could speak to him. Soon afterward, she rescued Honda, Shizuka, and Otogi Ryuji from Gulus pursuers and stopped to face them in a duel.

• Mai recognized Harpie Queen and Harpie's Pet Baby Dragon as rare, powerful cards and added them to her deck after their giver disappeared.
• Mai encountered Honda, Shizuka, and Otogi Ryuji fleeing Gulus members who were hunting Jonouchi's friends as hostages.
• Honda explained the danger, and Mai stopped her sports car to confront the pursuers instead of continuing to run.
• Two Gulus members dismounted from their motorcycles and raised their Duel Disks when Mai challenged them.

Mai faced two Gulus members in a rigged two-on-one duel, but her first draw triggered a mysterious Card System that offered her card packs for defeating them. She set aside her confusion and prepared to fight, while Seiya’s system was revealed to be a card-printing program he had built with virtual-world technology.

• Gulus A took the first turn, summoned Guardian Sky Dragon, and set a card before Gulus B summoned Bone of the Wasteland.
• The Gulus members relied on their planned Tribute Summons of Curse of Dragon and Summoned Skull, while Honda and Otogi Ryuji worried about Mai’s chances.
• Mai drew Harpie’s Pet Baby Dragon and saw it emerge from the card as a talking Kuriboh that announced the activation of the Card System and a mission to defeat the Gulus pursuers.
• Mai ignored the Gulus members’ taunts, decided to deal with them first, and readied herself to duel.
• Seiya’s Card System was revealed as a virtual card-printing program built using the Virtual World Seed and his scientific expertise.

Mai used Harpie Queen and her other Harpie cards to dismantle the Gulus member’s field and set up a decisive attack. She summoned Harpie’s Pet Baby Dragon, Seiya, and left her opponent facing a field of Harpies.

• Mai Normal Summoned Harpie Queen, stunning the two Gulus members with its 1900 ATK.
• Mai activated Elegant Egotist - Gorgeous Doppelganger to Special Summon Harpie Lady 1 and Harpie Lady 2, boosting the ATK of all WIND monsters on the field.
• Mai used Burial of the Dead to destroy Gulus A’s Guardian Sky Dragon, bypassing his set Burst Stream Trap Card.
• Mai Special Summoned Harpie’s Pet Baby Dragon, Seiya, who hopped onto Harpie Queen’s shoulder.

Mai defeated two Gulus members in a one-turn kill with Seiya, whose Harpie's Pet Baby Dragon effects boosted his power and protected him from a Trap Card. After the duel, Seiya revealed himself as a Duel Spirit and offered to become Mai’s partner, though she remained wary of him.

• Harpie monsters and Graveyard cards raised Seiya’s ATK to 2100, and Mai sent him to attack the remaining monster.
• A Gulus member activated Burst Stream, but Seiya negated and destroyed the Trap before defeating the opponent’s monster.
• Mai and the other Harpie Ladies attacked directly, reducing both Gulus members’ Life Points to zero.
• After Mai received a reward Card Pack, Seiya remained visible and explained that he was a Duel Spirit named Seiya.
• Mai asked why Seiya had chosen her, and he claimed she had a powerful Duelist’s soul before threatening to find another partner when she doubted him.

Mai accepted Seiya’s mission to save her friends and drove Honda and the others to the docks, where Marik had prepared a deadly Duel for the Nameless Pharaoh and Jonouchi. The group arrived before Yugi Muto, and Jonouchi was still under Marik’s control, chained over the water.

• Mai clung to Seiya, then listened as Honda asked her to take the group to the docks to rescue Jonouchi and Anzu.
• Shizuka and Honda pleaded with Mai to help, and a new mission appeared, ordering Mai to defeat the mastermind controlling Jonouchi and foil the Ghouls organization’s plan.
• Mai accepted the mission and drove Honda, Shizuka, and the others toward the docks while Seiya explained the mission’s rewards and penalties.
• Mai and the others reached Marik’s prepared stage before Yugi Muto arrived.
• The group saw Jonouchi controlled by Marik and chained to a bridge, where the Dark Game would send the loser into the sea.

Marik tried to lure the Nameless Pharaoh into a duel by taking his friends hostage, but Mai and the others turned the kidnapping attempt around and reached the Ghouls' base. Marik learned Mai had arrived and planned to deal with her as the Ghouls surrounded her.

• Marik arranged for Anzu Masaki, Keigo Kaiba, Honda, and the Nameless Pharaoh's other friends to be captured as leverage for a duel against Jonouchi.
• Marik was shocked when Mai and the Hostage Squad arrived at his headquarters instead of the Nameless Pharaoh and President Kaiba.
• Marik controlled a Gulus leader and demanded an explanation for the failed kidnapping.
• The Gulus leader blamed Mai for defeating his men and persuaded Marik that they had deliberately led the hostages to the base.
• Marik agreed to deal with Mai himself, while the Gulus leader privately congratulated himself for escaping punishment.
• Mai and her companions were surrounded, and Mai recognized that one of the Ghouls was being controlled by supernatural power.

Mai accepted Marik’s Death Duel against the mind-controlled Jonouchi without hesitation, while Seiya assured her that Jonouchi would be safe if she won. The duel began with Seiya taking Jonouchi’s first turn, and Mai summoned and equipped Harpie Lady - Cyber Dress.

• Marik revealed that Jonouchi was under the Millennium Rod’s control and named him as Mai’s opponent.
• Marik threatened Mai with Anzu Masaki as a hostage, but Mai accepted the Death Duel before he could finish explaining the rules.
• Mai chained herself to the duel arena, and Seiya’s assurance that Jonouchi would be safe helped explain her eagerness to fight.
• Seiya stopped Mai from taking the first turn, and Jonouchi summoned Dragon God Warrior and set a card.
• Mai drew, summoned Harpie Lady - Cyber Dress, and equipped it with Rose Whip to raise its attack power.

Mai endured the soul-piercing effects of Marik's Dark Game until Seiya protected her from Jonouchi's direct attack. Furious at Jonouchi for hurting Seiya, Mai built a powerful Harpie field and destroyed one of Jonouchi's Set Cards.

• Jonouchi activated Chain Disappearance to force Mai's Harpie Lady - Cyber Dress into Defense Position, then destroyed it with Dragon God Warrior.
• Marik used the Millennium Rod to make the duel a Dark Game, linking each duelist to their monsters through Soul Chains.
• Jonouchi sent Baby Dragon to attack Mai directly, but Seiya appeared and took the soul damage for her.
• Mai grew angry after Jonouchi's attack dirtied Seiya, then activated Hysteric Pact to add Elegant Egotist to her hand.
• Mai summoned Harpie Queen, used Elegant Egotist to Special Summon Harpie Lady 1 and Harpie Lady 2, and used Harpie's Feather Duster to destroy Jonouchi's Set Card.

Mai’s Harpie attack left Jonouchi badly weakened, but Marik’s influence drove Jonouchi to retaliate with a banned-card combination that devastated Mai in the Shadow Duel. Mai was left with only 500 Life Points, and Marik expected Jonouchi to finish her with another Fireball on his next turn.

• Mai’s Harpie monsters destroyed Jonouchi’s monsters and reduced his Life Points to 1300.
• Marik urged Jonouchi to use the cards he had given him, and Jonouchi drew a card while insisting that Yugi Muto was his real enemy.
• Jonouchi used Mystical Space Typhoon to destroy Mai’s set Trap Card, then activated Raigeki to destroy her monsters.
• Jonouchi played Fireball and summoned Flame Swordsman for a direct attack, leaving Mai with 500 Life Points and unable to stand.
• Kaiba condemned Jonouchi’s use of Fireball, while Marik revealed that Jonouchi’s Deck held three copies and expected him to draw another.

After Mai collapsed under Marik’s mental assault, Seiya took control of her body and began a comeback duel against Jonouchi. He restored Mai’s Life Points, cycled through cards, and filled her field with Harpie monsters, ending as he activated two Continuous Spell Cards.

• Marik taunted Yugi and revealed that Jonouchi planned to use Fireball again, but Mai stood up with a drastically changed demeanor after Seiya took control of her body.
• Seiya drew a card, activated Emergency Provisions to destroy Hysteric Pact and raise Mai’s Life Points from 500 to 1500, then used Hysteric Pact’s effect to add three Harpie monsters to his hand.
• Seiya activated Card Destruction and Gifts of the Angel to discard and draw cards, then summoned Harpie Queen, Harpie Lady 1, Harpie Lady 3, and Harpie's Pet Baby Dragon.
• Seiya activated the Continuous Spell Cards Chorus of the Water and United We Stand.

Seiya controlled Mai in a Duel against Jonouchi, powering up Harpie's Pet Baby Dragon to 5,200 ATK and defeating him. Jonouchi was saved from being dragged into the sea, and Mai completed her mission while realizing how much Seiya's tactics had taught her.

• Seiya stacked the effects of 'Chorus of the Water,' 'United We Stand,' and Harpie Lady 1 to boost Mai's Harpie monsters.
• Seiya used Harpie's Pet Baby Dragon's effect to raise its ATK to 5,200 based on the Harpie monsters on the field and in the Graveyard.
• Harpie's Pet Baby Dragon destroyed Jonouchi's Flame Swordsman, reducing Jonouchi's Life Points to zero.
• Harpie's Pet Baby Dragon severed the chains before they could drag the unconscious Jonouchi into the sea, then faded away.
• Mai regained control after the Duel, saw the mission-complete notice, and resolved to keep the power Seiya had shown her.

After the Duel City battle, Mai recognized that Seiya was the one behind her system and asked him for help getting stronger. Seiya refused to reward her for defeating weak duelists, leaving Mai to try a more personal approach.

• Jonouchi apologized to Mai, then promised to face her again, while Yugi acknowledged her improved strength and vowed not to lose to her.
• Seto Kaiba declared that he would claim all three God Cards and left by helicopter with Keigo Kaiba.
• Mai realized Seiya was likely the source of her system and went looking for stronger opponents to test her skills.
• Marik raged at his base because Mai had disrupted his plan and Harpie's Pet Baby Dragon had power rivaling the God Cards.
• Mai asked Seiya why her recent victories had earned no rewards, and Seiya said her opponents were too weak to trigger missions.
• Mai argued that Seiya had already bent the rules to help her, then tried to persuade him by exposing her cleavage.

Mai completed Seiya’s mission by defeating more than ten Duelists, then advanced to the Duel City top eight with a huge stack of Puzzle Cards. The tournament began its worldwide broadcast, and Yugi and Jonouchi won the first two matches as Marik made his entrance.

• Seiya gave Mai a mission to defeat more than ten Duelists, and Mai accepted because its failure penalty did not bother her.
• Mai defeated Duelists until she had collected a large stack of Puzzle Cards and became the second contestant to reach the advancement gathering point after Kaiba.
• Mai argued with Kaiba after he mocked her extra Puzzle Cards, and the top eight qualifiers remained Kaiba, Mai, Yugi Muto, Jonouchi, Isis, Marik, Rishid, and Dark Yugi.
• Kaiba Corp broadcast the tournament worldwide, and the appearance of Slifer the Sky Dragon heightened anticipation around the God Cards and the King of Games title.
• Yugi defeated Dark Yugi, then Jonouchi narrowly defeated Rishid, whose counterfeit Winged Dragon of Ra brought divine punishment and left him unconscious.
• Yami Marik made his official debut after his reckless actions during Jonouchi’s Duel.

After Jonouchi defeated Rishid, the group discovered that Nam was the real Marik Ishtar, whose dark personality emerged and was matched against Mai. Mai accepted the duel after her quest promised protection from the Shadow Duel’s worst effects, leaving her to face Marik and The Winged Dragon of Ra.

• Honda teased Jonouchi about winning through luck, and Jonouchi insisted his skill had won the duel.
• Kaiba identified Nam as the real Marik after Rishid fell, and Marik revealed his identity and threatened Jonouchi.
• Mai was assigned to duel Marik, and Yugi, Jonouchi, and the others urged her to withdraw because of the danger.
• Mai refused to forfeit, and her quest required her to destroy The Winged Dragon of Ra and win, while promising to shield her from the Shadow Duel’s worst consequences.
• Marik taunted Mai and prepared to use The Winged Dragon of Ra against her.

Mai dueled Yami Marik as he used Crush Card Virus to bind Harpie Queen and turned the match into a Shadow Duel that consumed parts of their bodies with lost Life Points. Mai ended the chapter with 1650 Life Points, badly hurt after Marik’s monsters attacked through her Mirror Wall.

• Yami Marik summoned Gill Gass, while Mai summoned Harpie Queen and attacked it.
• Yami Marik activated Crush Card Virus, trapping Harpie Queen and dealing Mai 500 damage during his Standby Phase.
• Yami Marik used the Millennium Rod to create a Shadow Duel where lost Life Points caused body parts to disappear into darkness.
• Yami Marik summoned Demon Soldier and attacked with both monsters, but Mai activated Mirror Wall to halve their ATK.
• Mai took 1850 damage, dropping to 1650 Life Points, while Jonouchi and the others tried to reach her and Kaiba Corp’s staff stopped them.