She made a cardboard mikoshi, and is trying to hold a procession with it, on her own, in a storm. "Do some summer festival wasshoi-ing", as she said in the last strip.
Also, the outfit is a reference to how on the internet people would joke about how they're going to pretend to act like TM Revolution in a typhoon or heavy rain.
The Akitsu Maru Festival OpensAnd just as I think that, looks like she's moping now that it wasn't as much fun as she thought.Just what drives her to go so far... is that even fun to do...?Afterwards, Akitsu Maru also had a 'fly high'.Ah, the portable shrine flew off...She's really doin' it...