So this Anime is more of a joke, it's also an ecchi. There aren't many episodes and each episode only goes for about 3 minutes. Altogether there are 27 minutes in the series. Plastic Nee-san is a really funny Anime and it'll keep you laughing for just about the whole 27 minutes. It's centered around three students: Iroe Genma, Makina Sakamaki and Okamoto. There's not really a plot or story line, each episode is completely different. This isn't one of my favouite Anime but it sure is a really funny one, and it doesn't take much time to finish the series so it really is worth watching! Enjoy~
