Lunar Days Sim Date

Karina has had the same dream repeatedly: alone in a library, a green-covered book in her hands, and every time she opens it the dream ends. She starts visiting the library to look for it. When she finally finds it and opens it, she is pulled into a different world called the Emerald World, where day and night are six-month seasons. She loses the book immediately but it is returned the next day. The only way back to her world is to wait thirty days, until the moon is full.