Amagami-san Chi no Enmusubi - Episode 10 - Girls Changing for Gym

Uryuu transferred into a school that recently switched to coed. And he's the only boy in his class!

According to this show, stumbling into girls in their underwear is Uryuu's thing. At least we can tell who the gyaru in his homeroom is from her leopard print bra and panty set. But what does Yuna's polka dot pattern say? "Kodomo-poi," was how my brain reacted.