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.
So we're just supposed 
to lie down and take it?!
أيُفترض بنّا ألّا نقاوم إذاً؟
Ihr wollt einfach das Handtuch werfen?!
¿Y hay que rendirse?
¿Y hay que rendirse?
On devrait se résigner, alors ?
Quindi dovremmo accettare tutto a testa bassa?!
Então devemos aceitar
de braços cruzados?!
Нам что,
молча проглотить эту фигню?!