I, Shinnosuke, Am the Card Master of the Ultra World.

The three protagonists grew up together in an orphanage. In an earthquake accident, the three of them traveled to the mysterious world of recovery and became Wang Shanshan in the original work. A princess who traveled to the Overlord world and became the Holy Kingdom The last one traveled to another blue star world and was reincarnated as Shinnosuke. Wang Shanshan's system can extract cards from the Yu-Gi-Oh World by sacrificing "Gui" The Holy Queen of the Overlord World can gain control of monster cards that manifest themselves from the Yu-Gi-Oh system by killing them. Blue Star Shinnosuke, who has traveled to the same world view as Ultraman, can find the navigation of equipment cards by exploring various secret areas. It's just that those monster cards that are powerful enough to become gods in the Yu-Gi-Oh world are also in his world. This is a story about Shinnosuke tricking Ultraman into joining him once he encounters a duel monster that he cannot defeat. Note: Shinnosuke appears at the age of ten in this book and will grow up over time. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.