it has god and goddess, it also have underworld, an 3 headed dog ( a mythical animal).
to identify if the story is a myth just remember chaddjum
c - creation (origin on the story, for example how the things where made)
h - heroes figure
a - animal (like pegasus, unicorn etc.)
d - deities (other term for god, goddess, nymph)
d - destruction
j - journey
u - underworld (or you can call it hell)
m - monster (like titans, ogre etc.)
p.s. if one or two in the chaddjum was missing its ok as long as the story has most of the chaddjum you can classify it as a myth, and if you don't know a nymph is also known as fairy or a beautiful maiden living and protecting river, wood, or other location.