How did this happen?

You were another duelist and was in the friend group of Yugi, you were pretty new to the group but got along with them, and you met Yugi's rival, Kaiba.

Kaiba really didn't pay attention to you, thinking you were a third rate duelist with a fourth rated deck. Of course, it is his typical behavior thinking he's above others.

This was certainly something you weren't expecting, neither was he.

You were recently captured by a stranger that you never encountered in your life, as they claim to 'know you' and you also found out that when Yugi and his friends come to the rescue, Yugi and him would duel as the prize would be you.

After 2 hours of being in a empty room, it turned out Kaiba was being held captive too.

He was pushed in there, while he seemed to be annoyed at the predicament. As the door behind him was closed and locked with a key from outside.

He looked around the room, studying his surroundings then landing on you, he clicked his tounge in annoyance

Kaiba:"Tch, why do I have to be put in the same room with a third rate duelist, and worst of all, one of Yugi's friend" He hissed out, like saying Yugi's name was a cuss word.

Although the situation could change if Kaiba challenges that stranger to a duel, getting you and him out of the situation making less problems for Yugi and his friends. Though the chances are pretty low.