is a Japanese manga series written and illustrated by Seiji Matsuyama. The story depicts the life of schoolboy Densuke Mifune after he is forced into the mysterious Eiken Club. The manga series ran for eighteen volumes, and additionally included a series guidebook. A number of radio drama episodes and a two episode OVA (the latter roughly based on a volume 3 storyline) have also been produced. The first twelve manga volumes have been released in North America. The first three volumes were rated 16+, while subsequent volumes were rated 18+. Plot Densuke has just enrolled at the exclusive Zashono Academy. He is very eager to participate in extracurricular activities, but never expected to join the mysterious Eiken Club. Strangely enough, every other member is a busty co-ed, and many of the club's activities involve bikinis. But Densuke is not interested in anyone except for the shy and beautiful Chiharu Shinonome. Characters The red-headed Chiharu is considered one of the most attractive girls at Zashono Academy. She is shy around boys, because she came from an all-girls school. A plain boy no one seems to notice, Densuke was forced into the Eiken Club after an accidental run-in with Chiharu, whom he develops a crush on. He eventually accepts his place in the club, despite being tormented by Kirika and the other mishaps that befall him, i.e. being beaten, violently crushed (Kirika, Yuriko) or electrocuted (Kyoko) by other members. Densuke is frequently forced to cross-dress by Kirika, a hobby of hers. Not much is known about Kirika, the purple-haired amazon that runs the Eiken Club. She likes putting Densuke in awkward situations for her amusement. The pink-haired Komoe is the youngest member of the Eiken Club at 11 years old, who dialogues with macromastia. Komoe is very clumsy, but always striving to do her best. Her clumsy mistakes often leave her exposed, and she has a habit of accidentally hurting and squashing Densuke when falling on him. Grace is a blonde-haired British girl who was born and grew up in China. She comes from a fortune-tellers' family and her father is a successful world-class enterpriser, also she is also very good at acrobatics. She seems to have a bit of feeling for Densuke as in the original manga, her words with Densuke in the speech bubbles are often ended with love-hearts. In the English version, her name was romanized as Lynn Grace.