I don't know why I said Kasumi's register switching was easier I lied I don't know what came over me. It's hard not getting her caught up in Paruyo's fanciness while still remaining distinctly "little sister." At least the art does a lot of heavy lifting.
Speaking of art, what else is there to say? This is where the manga starts radiating that cozy winter atmosphere. Even the tagline for this chapter was something like "the beginning of the warmest winter." My favorite minor detail has to be the way
Kasumi's hand lingers on the railing on the right of the spread - a tiny thing that lends so much physicality to the scene and embodies the way she's letting go, allowing Haruyo to sweep her away.
Though Haruyo's getting swept up in feelings even she doesn't understand. That's part of what makes them so cute - leading by inexperience, taking shelter in something you're not. Haruyo seems to treat their RP as more of a game, but as we saw volume 1 Kasumi's desperate for something like this to blanket out her past.
It's interesting how the manga modernizes Class S. Keeping their relationship secret not because it's forbidden, but because it gives them both a thrill to escape into. And when it comes to thrills, I never thought tying ribbons could be so immoral. Something tells me Haruyo doesn't quite see it yet, but Kasumi...