You are showing the Uppermoon show a corset works, using yourself as a explanation.

”No one wants a waist over”

You pulled on the strings allowing the corset to squish your waist making it tinier.

”Nine inches.” You said and tied it.

Douma was looking at you with a cocky smirk and clapped, Akaza was shocked, and Kokushibou…just stayed silent and eyed the corset.