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.
I can't take back what I did back then.
لا أستطيع سحب ما فعلتُه
Ich kann meine Taten
nicht rückgängig machen.
No puedo borrar lo que hice.
No puedo borrar lo que hice.
Ce que j’ai fait
ne peut être effacé.
Non posso cancellare ciò che ho fatto.
Não posso voltar atrás no
que fiz naquela época.
Сделанного не воротишь.