page 1 : mickey mouse ?
this chapter is probably a parody of this chapter , the 1st one to die is a teacher who is writing on the black-board , his head is exploded : https://mangadex.org/chapter/100391/
page 1 , panel 3 , and page 5 , panel 3 : you can see the monster girl with button eyes from chapter 1 . so after that event , she has fallen in love with sensei and so she has studied in this school to be close to him , lol .
" you dolls dare to hurt my sensei ? i will eat you to protect my sensei "
and monster girl 's class-mates already accept her and be friendly with her .