you know how to use a sword.

you went to a restaurant since you were hungry, after talking a little with the waitress you decided to leave.

as you were leaving a restaurant, a swordsman was next to you, accidentally causing the sheath of his sword and yours to collide

The strange man quickly turned to you, looking at you seriously with his black eyes.

"I hope you are prepared for the consequences. The touch of the scabbards means a challenge to a duel!"

he said, angry. It seemed like this was serious for him. He unsheathed his own sword and quickly approached you, preparing to attack

what will you do?