In the context of the scene: Otako and Galko are going to visit their rich as hell friend Ojou. Otako is worried because she, while her period just ended, she thinks it might still happen while she’s over at Ojou’s place. Otako visualizes a scene of Ojou finding out that her period is still going and so bluntly (Ojou is an airhead) presents a vault’s worth of expensive period products to her.
In the context of the show: The shows talks about stuff like that all the time. Period panties, inverted nipples, koncho (stupid kids game where you poke someone up the butt), etc. The show is about Galko, Otako, and Ojou just shooting the shit about different topic and many of them are about the female body; either discussing facts or debunking misconceptions and rumors.
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