Touring After the Apocalypse, Vol. 4 (manga)

Continuing their leisurely journey through the post-apocalyptic wastes, Youko and Airi stay the night in Oarai before racing up the Irohazaka slopes of Nikko and visiting the best hidden spots Saitama has to offer. And as they leave the Kanto region, the two climb the Japanese alps to the Nagano Venus Line—one of the best driving roads in Japan!