Step right up and try your luck against the human called the Red Oni! If you win you could become the next king of the Other World, if you lose you'll be a disgrace to your family! The Red Oni has already defeated 1 Oni with a single punch! Step right up and try your luck!
@Leo80221: Didn't see it that way, but you're right. Win Everything or lose everything. I guess the marriage candidates get filtered by the grandma before hand and she wouldn't pick anyone. That means they actually do have something to lose!
@Menreikill you're assuming that the size of his thing is proportional to his body. It probably is human size (which might mean that from an oni P.O.V, his thing is tiny)