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.
My sister loved this one idol girl...
...كانت أختي تحبّ إحدى الفنّانات الصغيرات
Und zwar die Haarspange,
die ein Idol getragen hatte, …
A mi hermana le encantaba una idol.
A mi hermana le encantaba una idol.
Ma sœur était fan d’une chanteuse
Lei amava moltissimo una certa idol
Minha irmã adorava uma idol...
Сестрёнка как раз фанатела по айдолу…
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