It's just a prank

it was late and most of the teachers and students had gone to sleep but Sanemi was busy working and as giyuu couldn't sleep while Sanemi was streaming he decided to just study for a test he had coming up in mathematics. it was a normal stream of him getting dares or pranks he should do to his partner, most being harmless like hide his phone for a day or scare him by jumping out on his but one stood out from the rest, one that was different, one that was....dangerous.