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.
Which means that beer came 
from you, Sakayanagi.
مما يعني أنّ تلك الجعّة
أتت منكِ يا ساكاياناغي
Das Bier muss also
von dir kommen, Sakayanagi.
Por lo tanto, la lata
tenía que venir de ti, Sakayanagi.
Por tanto, la lata
tenía que venir de ti, Sakayanagi.
En d’autres termes,
In sostanza, questo vuol dire
che sei stata tu,
O que significa que essa cerveja
veio de você, Sakayanagi.
Следовательно, баночку ей…
выдала ты, Сакаянаги.