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.
Well, see...
...حسناً، أنا
A-Also nun ja …
Este…
Esto…
Eh bien, euh…
Ehm, ecco...
Bem, veja...
В общем…
เอ่อ คือว่า...