B Gata H Kei (B型H系) is a Japanese four-panel manga series by Yōko Sanri. It was published by Shueisha and ran in Weekly Young Jump from 2004 to 2011. The story focuses on the salacious wishes of a high school girl, whose perceived drawback of being a virgin leads to her lusting after and pursuing a rather average and unremarkable boy in her class.
A 12-episode anime television series was broadcast on KBS, Tokyo MX, and other networks from April to June 2010. Funimation (later Crunchyroll LLC), has licensed the anime series with the title Yamada's First Time: B Gata H Kei, and released the series on DVD and Blu-ray in January 2012. A drama CD has also been released.
Plot
B Gata H Kei follows lascivious 15-year-old high school student Yamada, who makes it a goal to have sexual relations with 100 different guys, although her insecurities as a virgin herself lead her to reject every chance to do so. To overcome this mental barrier, she searches for a "cherry boy," an inexperienced guy who will be her first. She makes a rather plain classmate of hers, Takashi Kosuda, the target of her seductions for the sole purpose of achieving this goal; however, she ultimately falls for him.