Set in Sapporo, a girl reunites with her childhood friend and detective, Torikai Ayumu, who no longer attends school, and faces everyday mysteries. This coming-of-age mystery is built from four stories and was published after winning the award.

Boys and girls grow a little through the mysteries they encounter.

Recorded as a finalist for the 28th Ayukawa Tetsuya Award, but no standalone book publication could be confirmed in public bibliographic sources.

A finalist work with no confirmed standalone publication in public bibliographies.

Recorded as a finalist for the 28th Ayukawa Tetsuya Award, but no standalone book publication could be confirmed in public bibliographic sources.

A finalist work with no confirmed standalone publication in public bibliographies.

Recorded as a finalist for the 28th Ayukawa Tetsuya Award, but no standalone book publication could be confirmed in public bibliographic sources.

A finalist work with no confirmed standalone publication in public bibliographies.

A linked mystery set in a Kyoto clerical clothing shop, where a missing-item request escalates into a locked-room murder. The finalist work Red Casablanca was later published as 431-Second Murder: Kyoto Tsuji-uranai Detective Rokkaku.

The finalist work was later published as 431-Second Murder.