Mitsuhiko is missing during the radio taiso day. The Detective Boys ask about his whereabouts from Mitsuhiko's sister and learn he had been going out to an unknown location for the past few Sundays.
Genres: Animation , Comedy , Crime , Mystery
Keywords: adventure , age-change , anime , based-on-manga , cop , detective , dramatic , japan , japanese-high-school , mysterious , secret-identity , secret-organization , shounen , suspenseful , watch-series-online , watch-anime-series-online