When Amano's wandering around w/o money, he's offered a job at a stopover hotel for non-humans. Surprisingly, he finds out the Moon God, king of non-human world is a sacrificed human & resembles his childhood friend Mitsuki whom got swallowed by the odd thing long ago.
SIDE STORY: Seeing his childhood friends Ka-chan fell from the rooftop & covered in blood, Mi-chan got trauma & has becomes acrophobia ever since.
Mangetsu No Ou