Obviously the underwear company that was just about to strike a major brand deal for product placement of their new line of period panties in the unfortunately canceled Tsukinomonogatari (※no relation to Monogatari series). The company's logo was gonna be front and center with every single flash and everything, the contract stated no fewer than three flashes per episode. You know that Snickers bit in Nichijou? Yeah, it was gonna be just like that except for the whole anime, and instead of a chocolate bar it was gonna be characters talking about the MC's panties' top-of-the-line absorption due to its special synthetic fabric, or its patented anti-microbial technology, such that the viewers at home would know that they too can worry-not-Angkor-Wat whenever Aunt Flo arrives, because Being a Magical Girl Saving the World from the Forces of Evil is Hard Enough™

Yeah, of course the wokies had to ruin this marketing opportunity of a lifetime, smdh...