Shūeisha.

Yugi is a smaller than average high school student, and becomes an easy target for the bullies at school. He is given an ancient Egyptian riddle called the Millennium Puzzle by his grandfather who is a local game shop manager. Yugi pieces the puzzle together and unexpectedly becomes the powerful Game King. Now the heroic Yugi squares off against arch-rival Kaiba in an adventure even more dangerous when the imaginary monsters in their playing cards...