Aru Hi Inu no Kuni kara Tegami ga Kite

At a place in this world...there is a country where only dogs are authorized. All the dogs know how to go there and stay there regularly. This is here that the deceased dogs can live happily too. And those ones are allowed to send a single letter to a human of their choice.

(Source: Éditions Glénat, translated)

Aru Hi Inu no Kuni kara Tegami ga Kite is based on Maruko Tanaka's 2009 picture book of the same title. The series has been published in French by Éditions Glénat since November 19, 2014.