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.
You guys...
...رفاق
Leute …
Chicos…
Chicos…
Les amis…
Ragazzi...
Vocês...
Ребята…