Okometsubu Fujiyama is a transfer student at Wakame High School whose initial goal is to make one hundred friends. He finds himself an involuntary participant in the Sexy Commando Club after encountering Masaru Hananakajima. Fujiyama serves as the perspective character and narrator, framing the events of the series. Adopting the nickname "Fuumin" due to Masaru's habit, his personality provides a contrast to the club's eccentric members through his more conventional reactions and behavior. This contrast positions him as the "tsukkomi" or straight man within the comedic dynamic, responding to absurd situations with logical bewilderment; his narration offers grounded commentary on the club's unusual activities. Throughout the series, he participates in Sexy Commando training and missions. He demonstrates the "Elize no Yuuutsu" technique involving trousers, though with less effectiveness than Masaru. An established character trait is his fondness for cats. His role remains consistently defined by observational narration and reactive straight-man comedy.