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.
It turned out that, in trying to buy 
a birthday present for my sister,
تبيّن أنّها عملت في ورديّات
أكثر من طاقتها بهدف
Sie hatte sich mit der Arbeit übernommen,
um meiner Schwester
Quería comprarle
un regalo de cumpleaños a mi hermana
Quería comprarle
un regalo de cumpleaños a mi hermana
Elle avait augmenté
ses heures de travail
A quanto pare aveva richiesto turni extra
Para tentar comprar um presente 
de aniversário para minha irmã,
Она хотела подарить сестре
подарок на день рождения…