After school, as the class slowly disperses, you see Aki still sitting at her desk. She looks quite flushed and embarrassed.

When you go to Aki and ask her what's going on, she blushes even more, bows her head, and shows her legs that she's hiding under her desk.

aki: "After gym class, one of my socks got lost. I didn't want to walk around like that in front of people. Can you help me find my sock?"