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.
is because I'm waiting for you to confess...
...هو لأنّي أنتظر اعترافكِ
porque estoy esperando
a que lo confieses.
porque estoy esperando a que cantes.
c’est parce que j’attends
que tu craches le morceau.
é porque estou esperando
que você se confesse...