maybe the author wanted to draw the detailed folds or something/just wanted to show what kinda panties they're wearing, might depend on habit, i feel like ppl would take off both at the same time if it's a skirt versus jeans or maybe panties first outta habit like they're only going to the bathroom
lol i know this is a fanservice scene but it's amusing when mangaka draw 'straight' girls groping like this
It would be an interesting twist if those two women actually were strictly homosexual, and that's why Akari never much minded Takeo, knowing nothing could happen between them. Takeo, naturally, would be going through all of those dreams and delusions in vain.