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.
To restore my mother's and 
sister's trust in me, too.
لاسترجاع ثقة أمّي وأختي بي أيضاً
Auch um das Vertrauen meiner Mutter
und Schwester zurückzugewinnen.
Para recuperar la confianza
de mi mamá y mi hermana.
Para recuperar la confianza
de mi madre y mi hermana.
pour regagner la confiance
de ma mère et de ma sœur.
Volevo farlo
Para restaurar a confiança da minha
mãe e da minha irmã em mim também.
И вернуть… доверие матери и сестры!