"Something strange has arrived." The splendid story of the heroism of the robot Musashi, created by the master craftsman Toppi Jingoro! His great success in destroying the dojo and exterminating monsters!? Pakasuke, a famous character from Maetani's work, also embarks on a journey to rise to success! "Pakasuke's Letter of Conduct'' is also included! [Commentary] Koremitsu Maetani's 18th collection of rental masterpieces is Robot-kun and Pakasuke! It combines the heroic stories of the two heroes! It also includes the unparalleled (!?) ``Robot Popeye''! <Robot Legend> A robot created by Toppi Jingoro and given a soul by God has set out on a journey to train as a warrior! Let's take on the challenge at the dojo! Pakasuke, a horse who is tired of working in the fields, sets out on a journey with his owner, Yotaro, in order to earn a fortune on the battlefield and get promoted...!? <Robot Popeye> Robot-kun tries to become strong in order to participate in the Olympics. What is the secret to that...?