Sayori: she's with the Literature Club in her room, and they're all in their bras and panties

Sayori: So, then, there was- her tummy gurgled Oh, sorry...

Monika: Hah! Her belly made a noise- her tummy grumbled

Yuri: giggles That's funny- her belly rumbled

Natsuki: 😆😆😆 her belly growled

(Note: they're all wearing bras and panties)