第659話: 探偵少年団は千葉警官と協力して初恋に関連する破壊行為を調査する
2012年6月9日 放送
659
The Detective Boys discover officer Chiba's has been vandalized with a threatening word. Realizing is the culprit is the same person who has been on a vandalism spree that month, the Detective Boys push Chiba into investigating it with his first love. (Source: TheTVDB)