Case Closed Cosplay

Serious high school student Kudou Shinichi goes to play on the fairground with his childhood sweetheart Angel,and they find two strange black suited men.Kudou follows them to the trade scene and then he is attacked and filled with a secret poision named APTX4869,then he is transformed into a child.Kudou lives in the Angel's home and hopes to find the black suited men with the power of Angel's father-Mouri Kogoru.And one day he hopes he will transform back and bring to justice.