Kamigami no Asobi - A Fanfiction

Kusanagi Yui is a young girl who lives at a shrine, and whose life is rather normal and uninterrupted by unusual things, that is, it was normal. One day, she finds a magical sword in the shrine's store room and it transports her to a magical garden, one which she will never escape from if she doesn't graduate from it.

Yamane Masaki is a normal human, just like Kusanagi Yui, and her best friend, or so she thought. It turns out she is a young god, not mentioned in any mythology, since she was only recently born. Her constellation, the Southern/Northern cross, having only just being recognised by humanity (even though it was scientific), gave her a unique power. She is Seiza, God of the Stars.