you tried calling Niki by his full name just to prank him "Nishimura Niki"

"I didn't do it" he said, obviously scared of you

"I was just trying to-" you stopped in the middle of your sentence when you realized something "wait... what is the thing you 'didn't' do?!" you asked with one eyebrows raised and standing up looking at him intensely

"nothing-" he said, afraid and was ready to run away