A collection of stories:
1-3. Ningyo Ouji: Mugi has moved to an island in southern Japan, but he doesn't seem to get used to it. That is why Matori, his classmate, does not leave him alone for a second. One night, Mugi sleeps over at Matori's home. That's when her grandmother tells him a story about sirens who are able to fulfill any wish...
4. Yuki no Hi