(ACG) striped panties, (especially) white panties with sky blue horizontal stripes (a trope in fiction associated with feminine immaturity)

boyshorts

production of bread

to produce bread

(informal) punching with one's fist

rye bread

Short for 海水パンツ.

パンの耳: bread crust

bread crust

a type of panty that is worn by tying together strings on the sides (as opposed to normal panties which simply have a waistband)