Taro Hirai, an aspiring mystery author, has to work multiple jobs to make ends meet. His life changes drastically when Detective Saburo Shirai hires him to become his assistant.

Taro Hirai, an aspiring mystery author, has to work multiple jobs to make ends meet. His life changes drastically when Detective Saburo Shirai hires him to become his assistant.

Despite his best efforts, Hirai Taro fails to rescue Ohyaku. Meanwhile, Hatsunosuke is plagued by feelings of inferiority toward Taro and finds himself captivated by his encounter with Sumeragi.

Taro Hirai, an aspiring mystery author, has to work multiple jobs to make ends meet. His life changes drastically when Detective Saburo Shirai hires him to become his assistant.