Elf to Bike to Teikoku Chiri Chousain to

Nonoa is an elf who works as a research assistant at the Imperial Geographic Institute. To update their maps, she and her partner Kago ride a motorcycle to survey an area where the roads are haunted by monsters and evil spirits. When Noa takes a rest to bathe in a spring, what appears in front of her...? (Source: Young King Ours GH, translated)