Turns out the one spreading the rumors was Hashimoto, who did so at the behest of Sakayanagi. Shortly thereafter, Sakayanagi appears before Class C and she informs them she has evidence regarding the rumors about Ichinose.
Don't ignore us, you bastard!
!لا تتجاهلنا أيّها الوغد
Ignorier uns nicht, du Arsch!
¡No me ignores!
¡No me ignores!
Enfoiré ! Nous ignore pas !
Ehi, non provare a ignorarmi!
Não nos ignore, seu desgraçado!
Козлина, ты про нас не забыл?!