JC - Lovely Mystery (♠♥♠JC – ラブリーミステリー, Raburī Misuterī) is a mystery novel written and illustrated by Naoko Izutsu under a pen name "Kotori Misono". According to Takagi, it is Chiba's favorite manga series. Only what is known is that the story goes about a beautiful female detective that solves probably complicated mysteries. It can be known that it is a weekly serialized series, as stated by Naoko that she and her assistants where finished in the morning with the manuscripts. As known for a manga artist, the assistants are not mostly staying until the entire chapter of one manga has finished during the days. Mostly during the nighttime, the assistants are going home which the manga artist continue in finishing their manuscripts on time.