Imagine little 12-year-old Marik walking through the village bazaar on his first time outside and being too distracted by the motorcycle in the magazine to look where he’s going.
Now imagine little 10-year-old Yami Bakura walking through the village bazaar on his first time outside in a few hundred years and being too distracted mentally gloating to see where he’s going.
And then they run into each other. Little Marik apologizes and tried to help little Bakura up. Little Bakura pushes little Marik away and shouts “insolent fool!” They make eye contact, then go in opposite directions completely unaware of Fate.