One of the five possible miniature books (mamehon) given as gifts for mailing in entry tickets found in Harta volume 70 or certain Harta series tankobon.

The story takes place in Iceland, at land’s end, 64°N. 
Kei Miyama is a 17-year-old with three secrets: he can talk to cars, he can’t handle pretty girls, and he works as a private investigator. One case has him searching for a beloved dog, another involves reuniting a woman with a man she fell for at first sight. And then comes a case that strikes close to home—searching for his own little brother. 
Tag along as this globe-spanning journey unfolds…
 
(Source: Kodansha USA)
 
Note: Nominated for the 12th Manga Taisho Award in 2019.

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