Tokyo: Starting with the Shrine Maiden

Haruhiko is transported to the demonic Tokyo of the game, beginning his second life.
Her origins are unknown; she was adopted by a shrine maiden from the Inari Shrine, a friend of her mother.
But he unexpectedly discovered that she was not human, but a monster.
It's okay, being pretty isn't a problem.
However, he then realized that his mother's friend was actually someone else.