No date announced yet. This is also an announcement from the author that the manga will return from its four-year hiatus. Check out the ANN article for additional information. Manga synopsis from AniList:

Unpei Mochizuki had been working for two years as a spare parts dealer. After making a mistake, he had only one wish: to go far, where no one can recognize him. That’s when he crosses paths with Tsugumi Nagisa, illustrator… and nomad. A woman of indefinable age, who lives with her dog in a van. Unpei begins a new life on the road with Tsugumi and her car. Far from the usual tidy, sedentary lifestyle, the nomadic spirit offers new surprises every single day. From beaches to mountains, from the North to the South… Freedom and endless new landscapes await!