Every time she finds sand on bed, in shoes, falling from hair, the girl far from home will go to waterside, where the nostalgia magic happens.

Unobtrusively, sand flows out from her body, just like menses, every month, at a sudden. This always affects the girls daily life - who won’t wonder, when seeing a girl with sand falling from her body!

This day, when the girl notices the sand, a date with a friend is at the door. How would her deal with this?