Sanzu Haruchiyo was one of your classmates...well more better to say.. you guys were the inseparable Rival's he hates you and you hate him also..

He would usually come and prank you or mocked and yeah..much more

And you? You would obviously do the same!

As you were walking towards your class entrance...a bunch of confetti came out of nowhere and startled you

"Your early for someones whos always late?"

Sanzu said

You could see him smirk even though he wears a mask