At the last scene of classroom assassinations!!!!

Seriously......that was not the time to take a roollll callll...as teacher he said.....he was once a great assassin......and the way the students had their fight once to whether they wanted save koro-sensei.....during his flashback.....the way they treated him as a tester....or how he failed to know the face of his student....and also at last where he calms down Nagisa ...and (seriously ) tells him to kill him calmly .....Argghhhh .i cried the hell out ..... （￣へ￣）