Somewhere in Japan, there is a shrine called Hakurei, and within this shrine there is a barrier called the Hakurei Great Barrier.
Inside the barrier, monsters and humans live together. It is a fantasy place without the hustle and bustle of the outside world, so it is called Gensokyo.
Sometimes people from the outside will be hidden in it by a monster sage.
This story is what happened after a young man was hidden in Gensokyo by a god.
This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.