"The rounds end when one person either gives up or is struck on the neck." Seiko takes his sword and does the same as Karite, though his is a bit more vocal about it.
"Just what the hell do you think you're doing?! You take me out of this sheath and use me right now! He won't suspect it at all!" Seiko ignored his sword's cries and faced Karite. "Are you ready? Because no, you're not. Hope you don't mind me starting, I have a few new things to try out."
Seiko smirked before launching himself at Karite, almost but not quite blurring into a shunpo. But the confusing part is that he stopped himself right in front of Karite and, instead of attacking, suddenly vaulted over Karite's head, flipping in the air and delivering a side kick to the back of Karite's head.