Don't Eh Usa, you clearly at fault here. It feel kinda off anyway that Usa became suddendly possesive toward her,she wasn't before and suddendly she feel the urge to keep Chika to herself. It's not tottaly ooc but still it's quite the shift.
Hehehehehe almost two pages of dancing and 7 with fanservice, sasuga mangaka san... sasuga
Is funny how Usa is getting jealous like a kid and like 2 chapters ago we had USa's friend acting jealous but she quickly got over it I guess? Because I want them to get closer too...