
Clarifying this panel
This is not Baku having a feet fetish, I just wanna clarify that, if you already knew sorry for sounding assertive.
This is based on a famous saying in Japan where looking at someones feet means exploiting or taking advantage of someone once you find out someones weakness.
So this is Baku taking the Idiom of looking at someones feet, where you scam a person when they are in a time of desperation literally as a form of mockery.
It originated as in pretty old times in Japan, Inn's would look at a travelers worn out shoes to determine how much they can charge for their place.