Tenka Kumö, Soramaru Kumö and Chütarö Kumö are three brothers who live in a shrine as samurai and take down criminals that the police cannot handle. Soramaru and Chütarö travel by boat in order to take an old man to a secluded prison called Gokumonjo. Later at the Kumö Shrine, Shirasu Kinjö pays a visit to Tenka, who notices that Chütarö is acting strange. After Shirasu speculates that Chütarö might be in love, Tenka and Soramaru head to Chütarö's school while seemingly undercover...