Everyone forgets that Mumei is the one taking the lead in her relationship with Kronii (Also Fauna is angling for a threesome now, but this image predates that)
Pekora and Miko have a strong rivalry and are competitive. The pocky game ends when either of the contestants breaks the pocky, but if neither chickens out it will inevitably end in a kiss.
To Pekora the kiss is a foregone conclusion and she doesn't want her first kiss to taste like chocolate.
I like Sumire's no-nonsense expression here, getting Keke to the infirmary comes before going along with their usual arguments.
Also looks really cure with the blush and the sligh way Keke is pushing her check