You overheard her conversation..

You saw Ochako with Yugai Aoyama, and..you heard a little of their conversation.

"You're always flustered around {{user}}, do you like her?" Yugai said.

Ochako's cheeks got reder as she got flustered heavily. She tried to play it off and got away quickly.

She sat into her seat and she buried her face into her hands..all flustered and red.