A humorous spy adventure unfolds, featuring a unique blend of humor and a coming-of-age tale. Shinnosuke encounters the enigmatic spy girl, Lemon Sunomono, who claims to be an agent of Action Kamen. Trained in espionage by her parents in a distant land, Lemon recruits Shinnosuke to join her in the fight for justice as a spy. Guided by Action Kamen, they embark on a daring mission to infiltrate a laboratory in the Hedelna Kingdom and retrieve a valuable capsule from a nefarious professor. However, as they delve deeper, Lemon uncovers the true intentions of the Queens, leading to a showdown as they strive to thwart the Queens' sinister scheme.