B Gata H Kei, titled Yamada's First Time: B Gata H Kei in the English dub, is an anime television series from the manga of the same title written by Yoko Sanri. It was produced by Hal Film Maker. It premiered on the KBS and Tokyo MX television network on April 2, 2010, and ran weekly for 12 episodes. FUNimation has licensed the anime series, releasing it on DVD and Blu-ray on January 31, 2012, and later broadcasting it on the Funimation channel and uploading it to various broadband services.
The opening theme song for the series was "Oshiete A to Z" (おしえて A to Z?) and its ending theme was "Hadashi no Princess" (裸足のプリンセス?). Both theme songs are performed by Yukari Tamura, who voices the title character Yamada. A maxi single containing the two themes was released on April 28, 2010.
We are introduced to Yamada, considered to be her high school's idol, and to her mission in life in high school: to obtain a hundred sexual partners. However, she is rather picky, and decides to concentrate on a guy named Takashi Kosuda, whom she meets at a bookstore while shopping for a dictionary; and her would-be classmate.
She then steps her campaign up a notch by finding a way to go home with Kosuda so that she can "get him." She is able to even get into his room; and seemingly with his liberated sister Kazuki's "blessing." However, her inexperience scares her to death that she rushes out of Kosuda's house in haste.
Yamada continues to seduce Kosuda by inviting him over to the pool. For this, she selects a rather sexy swimsuit for him. Yamada's friend Miharu Takeshita was worried Yamada might steal her boyfriend, Daisuke Matsuo, but it didn't happen--instead, Matsuo-senpai and Kosuda become instant friends. Yamada enjoys riding with Kosuda on the water slide, but gets disappointed when she finds out Kosuda is afraid of heights, hence his clinging tightly to her. Kosuda manages to make up with Yamada during the fireworks display, when he hugged Yamada from out of the blue, taking Matsuo-senpai's suggestion. Now Yamada prepares for "the big moment" by buying tons of condoms, while Kosuda seems even scared to buy condoms for himself.