Ep. 4: Riho visits Fuu's home for photos while Sayomi plans a trip to a potential location.

4

Riho chooses to go to Fuu's residence to examine photographs. Subsequently, Sayomi organizes an excursion to a new site that might be where the photo was taken. During this outing, Fuu injures her ankle. She receives assistance from the owner of a camera shop, who aids her in identifying the correct location for the picture. This interaction allows Fuu to realize that the current spot is indeed where she originally took the photograph, resolving the mystery through the help of the shop owner and the group's continued search.