A dark side of a new student, Bakura, is coming out. At school, Jyoonouchi tells his friends that he much feels good after Death-T game of Kaiba. It made him more confident. Anyway, Miho sees Bakura and goes to greet him how he feels about new school. Bakura doesn't feel good from his millennium ring, thus he leaves his friend and stays alone in the restroon. He hears some sound from his own mind. His dark side is trying to coming out. During exercise class, the teacher, Karita, is such a strict guy to the students without reason. He tries to punish Bakura who late joins the class. Yugi and his friends tries to explain that Bakura has been sick since morning but Karita refuses to listen. He also tells them to stay away from a new student, Bakura. Before moving to a new school, Bakura's friends all become sleeping princes. Bakura agrees with his teacher and askes Yugi and his friends to leave him alone. With bad feeling, Bakura leaves the school during afternoon class. Jyoonouchi and his friends decide to prove the truth and go visiting Bakura at his home after school.

At Bakura's condominium, Bakura can't control his feeling. His dark side appears from a millennium ring and tells him to get a millennium puzzle from Yugi. He explains that Bakura has never had friends since he was young. Thus, his shadow usually makes his dream come true by transferring people's minds into dolls to become his friends forever. Bakura refuses to harm his friends anymore. Anyway, he hasn't expected that his friends are visiting him at his home. A shadow mind absolutely controls his body and invites Yugi and his friends come into his room. Yugi sees a large amount of small dolls showing inside window glass. He knows that Bakura really like a game about Monster World. It is a kind of RPG (Role Playing Game) played on board. Everybody feels very interested in this game. Thus, shadow Bakura invites everyone play the game at another room. Board of this game has already been prepared for them. No one realizes that this is a trap of a shadow game.

Playing this game, everybody has to choose his own doll as his role, then put the doll on board. Winning this game, players have to find and destroy a dark master, Zork, who tries to rule the world. Shadow Bakura plays as Zork and game controller. When game starts, Jyoonouchi has no idea how to find Zork of where to go. Anzu suggests that in normal RPG, information usually comes from a village. Jyoonouchi decides to put his doll into a bar. He finds a doll familiar with his teacher, Karita. Then, everybody seems to hear his teacher's voice. Karita was attacked by shadow Bakura during afternoon and transferred his soul into a doll. He tries to tell his student about Bakura but Bakura pushes him to continue his role play. Thus, Karita tells Jyoonouchi and his friends to find Zork at the north castle. Leaving the village, all players first face to a monster. Shadow Bakura explains them how to set their attack power. Players have to dice 10 sides dice. There are 2 dices of them. A white one stands for the first digit of number (1-10) while the pink one stands for the second digit of number (10-90). The total amount is counted as percentage. Closer 00 players can dice, higher attack power they get. On the contrary, closer 99 players can dice, lessor attack power they get. Also, they may be punished from game controller by transferring into the dolls. Surely, shadow Bakura keeps it quiet until it is time. Jyoonouchi first dices and succeeds in destroying a monster. Game is continuing. Players see a boy sleeping on the ground. They can choose to leave him there or helps him. Without consideration, Mihi decides to help him. A boy tells the players that he left a holy sword able to destroy Zork in the forest. Yugi isn't sure if there is really a sword like that. However, everybody decides to go into the forest. In this area, possibility of monster' s appearance is high to 80%. 5 monsters appear on the field. Jyoonouchi first dices but he fails to get enough power to attack. Then, turns come to Honda who can use magician gun destroy a monster as well as Yugi who can change a monster to be his friend. Anzu dices and gets 00 that is the highest rate called "Critical". Thus, she can use her magic power destroy all 3 monsters left. Miho is a trader who only finds money.

The situation is changing, in fact, the boy who disguises himself is Zork. Turn comes to shadow Bakura who plays as Zork. With his dice, he can first attack to Miho and transfer her soul into a doll. Honda feels much angry, thus he continues dicing despite that it isn't his turn. So, he is punished and transferred his soul into his doll so. Move to Jyoonouchi's turn, he doesn't get high attack power from his dice, thus he is also transferred the soul into a doll. Then, Yugi and Anzu ask shadow Bakura for transfering their souls into the dolls to together fight with their friends. Shadow Bakura gets confused because it means that game is over if there is no player who dices and continues the game. Anyway, he responses their request. Then he is surprise when he sees Yugi still sitting. Another Yugi continues the game and starts dicing for Jyoonouchi as a warrior. Everybody is alive in Monster World now. His and her life depends on another Yugi who must face against shadow Bakura as dice player.

Yugi - A monster master ¼Ùé¤Çº¤ØÁÊѵÇì»ÕÈÒ¨ Race: Half - Elf Weapon: none Equipment: Elf's gown Ability: Speed - 17 Sagacity - 18 Strenght - 9 Bravery - 8 Level - 1 HP (Hit Point) - 22

Jyoonouchi - A warrior ÍÑÈÇÔ¹ Race: Human Weapon: sword Equipment: shield, armour Ability: Speed - 16 Sagacity - 8 Strenght - 20 Bravery - 21 Level - 1 HP (Hit Point) - 25

Anzu - A magician ¼ÙéãªéàÇ·ÂìÁ¹µÃì Race: Elf Weapon: none Equipment: Elf's stick, Elf's gown, Elf's hat Ability: Speed - 20 Sagacity - 17 Strenght - 9 Bravery - 14 Level - 1 HP (Hit Point) - 18

Honda - A magic gunman Á×Í»×¹àÇ·ÂìÁ¹µÃì Race: Human Weapon: magic gun Equipment: gown, magic bullet Ability: Speed - 18 Sagacity - 10 Strenght - 14 Bravery - 19 Level - 1 HP (Hit Point) - 23

Miho - A tradewoman áÁè¤éÒ Race: Angel Weapon: none Equipment: gown, ornament Ability: Speed - Sagacity - Strenght - Bravery - Level - 1 HP (Hit Point) - 15

Bakura - A white priest ºÒ·ËÅǧ»ÕÈÒ¨¢ÒÇ Race: Weapon: none Equipment: gown, priest's stick Ability: Speed - Sagacity - Strenght - Bravery - Level - 13 HP (Hit Point) -