Boys, be ambitious! Boys, be ambitious! The short mystery work "Goroppe Meitantei" is also included in the book for the first time! Two boy heroes drawn by Daiji Kazumine. Readers might be able to meet their childhood selves in the stories woven by these bright and energetic characters! <Dongara Ganbo> In a time when the world was in turmoil, Dongara Ganbo, a boy hero who aims to calm the turmoil and take over the world, creates a storm! Don't lose to ninjas, scientists, and villains who aim to take over the world just like Ganbo! Dongara Ganbo!! <Goroppe Detective> The funny Goroppe and his good friend, Mosako, are involved in a mysterious incident in a port town!! Can Goroppe catch the villain!?