[Fujiyama "Fuumin" Okometsubu] is an exchange student who comes to [Wakame High School] in his Junior year. He's a typical shy, nervous boy, but he is determined to make new friends and start a new life. His grand plan is to make a 100 new friends. Things don't go quite according to plan though, as his first day at school also happens to be the first day that Masaru Hananakajima comes back to school. Rumor has it that he left school for the past 3 months to live in the woods and practice some sort of secret martial art. He happens to be one of the nicest people you'll ever meet... and also a complete weirdo who lives in this constant black hole of strangeness. Through a twist of fate, the two become friends - if you can call getting dragged around constantly by Masaru a twist of fate ...
Masaru starts a new club at school to demonstrate his secret new martial art - Sexy Commando - and recruits kids from around the school. First, of course, is Fuumin, who gets haplessly drawn in. Next is Machahiko Kondou, the third-year karate club captain, a nice, honest boy who has this thing for being as manly as possible. After that, they collect Tsuyoshi Isobe, a boy who wants to be the strongest person in the world, and who isn't dissuaded by the fact that his body is built like balsa wood (his nickname is Kyasharin, which basically means living bones). Throw in manager [Kitahara "Moemoe" Tomoe], whose fascination with moustaches exceeds even Masaru's, coach [Matsuda "Torepan" Tatsurou], and the mysterious Susan, and there you have the [Sexy Commando Club]. Together, they have many bizarre adventures - the Baseball Game of Honor, the Alien Camping Trip, the National Sexy Commando Tournament, Going to Masaru's house, the Kidnapping of Meso, and tons more.