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.
You're so smart, Ayanokoji-kun.
أنت ذكيٌّ بحقّ يا أيانوكوجي-كن
Auf dich ist Verlass, Ayanokōji-kun.
Eres increíble, Ayanokoji.
Eres increíble, Ayanokoji.
C’est brillant, Ayanokôji.
Rien à voir avec Horikita.
Sei proprio bravo, Ayanokoji-kun.
Você é tão esperto, Ayanokoji-kun!
Какой же ты сообразительный!
สมแล้วนะ อายาโนะโคจิคุง