This is brilliant in so many different ways.
I kinda wonder what is Protagonist-kun thinking of these recent developments, lol. (Not that I really give a fig about him, but still...) It must have been shocking enough that two different girls maneuvered to prevent him from touching boobs two times in a row, but that last one improv at the lockers resulted in him taking a thorough beating... 乁( ͡~ ͜ʖ ͡°)ㄏ
(For those who don't get it: it should have gone like "P-kun enters the classroom, meets a girl, asks her to hide him, then she takes him with her into a locker and the sensei fails to find them." Instead it went like "P-kun enters the classroom, meets no one at all, stands there like an idiot, then the sensei finds him and beats the shit outta him.")