Touring After the Apocalypse, Vol. 4 (Touring After the Apocalypse, 4)

After staying the night in Oarai, Youko and Airi race up the Irohazaka slopes of Nikko to find the best hidden spots Saitama has to offer. However, on their way, what starts as a casual detour quickly turns into something much more when the two encounter unexpected sights that are positively out of this world!