Once upon a time, Byakuya is sipping tea and chilling in his little pond.
Talking to his favorite Koi fishes.
Suddenly, three random ninja students appeared and one of them falls in the pond squashing Byakuya's favorite Koi named Ichi.
The students apologizes, saying that they were in a mission but got lost, Byakuya's vision went red after seeing his helpless Koi, instantly killing one of the students, the other one incapacitated while the last one is crying his pants off.
Kakashi appears then saw one of his students asking for explanation.
Byakuya ignores, killing another student.
Kakashi needs no explanation then went to his instincts.
No prep time.
Byakuya's flight ability is disabled.
Wins via death.
Current Byakuya and Kakashi.