Hoshi no Furu Toki

Hoshi no Furu Toki is an otome game that takes place in modern times and focuses on a second year female high school student, Akane Hasekura.

When the protagonist Hasekura Akane was 10 years old she was given a sparkling jewel fragment by a mysterious beautiful woman.

But in the blink of an eye, that women and the jewel both disappeared and thinking it was a dream Akane forgot all about it.