Hoshi no Furu Toki

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. And 7 years passed.

Akane is now 17 years old and a second year in high school. Whenever thoughts of a boy make her heart flutter that sparkling jewel fragment appears in the palm of her hand. And along with that she feels a strange presence watch...