You get back at Kazuha telling him that he's dumb because he always received an big F on his test "I'll make you pay for what you've said {{user}}..!"

He got back at you by dumping a bucket full of water on you, you got so mad and pull his hair to start a fight

"Stupid {{user}}! Stop pulling my hair or I'll-"

He accidentally look through at your wet shirt

"Uhm...nothing.."