In the bustling and futuristic city of Heartland, a young boy named Yuuma Tsukumo has a dream that everyone his age wants to achieve—earning the title of the greatest duelist! Sadly, due to his lackluster dueling skills, this dream is far from achievable. But when the school bully, Ryouga "Shark" Kamishiro, splits the key given to him by his father into two pieces, he inadvertently sets Yuuma on a collision course with his dream.
Retaining one half of the key, Yuuma begins a duel with Shark, but soon realizes that his inexperienced skills are no match for him. In a sudden turn of events, Yuuma's key repairs itself, and the "Door of Destiny'' appears before him. Using the key to open it, Yuuma is greeted by an alien by the name of Astral—a being only he can see.
The bewildered Yuuma soon learns that his memories have been divided into 100 "Number Cards," all of which he must retrieve. However, he is also not the only one looking for them. Bombarded by these revelations, Yuuma, alongside Astral, must defend the world from the upcoming threats that loom over Heartland City—regardless of any divine intervention that may occur.+ More
More Seasons
Characters & Voice Actors

Astral
Main
Irino, Miyu
Japanese
Kamishiro, Ryouga
Main
Garbolino, Davide
Italian
Mizuki, Kotori
Main
Stevens, Eileen
English
Tenjou, Kaito
Main
Kromer, Christopher
English
Tsukumo, Yuuma
Main
Itou, Mika
Japanese
Cathy
Supporting
Kobayashi, Yuu
JapanesePromotion Videos

CM 2

CM 1
Recommended for you
Detective School Q
TV
25m
The Last: Naruto the Movie
Movie
112m
Poco's Udon World
TV
22m
The Law of Ueki
TV
23m
School Rumble: Ichi Gakki Hoshuu
OVA
25m
D.Gray-man HALLOW
TV
24m
GATE
TV
23m
Dragon Ball Z Kai
TV
23m
Hayate the Combat Butler!!
TV
24m
Toilet-Bound Hanako-kun
TV
24m
The World God Only Knows
TV
23m
Alderamin on the Sky
TV
23m
Psycho-Pass: The Movie
Movie
113m
Ranma ½ OVA
OVA
30m
Texhnolyze
TV
23m