Manatsu No Ningyohime

From Shinnen:
Ayumi, a student of a high school by the sea. Her name was taken from the image of the Little Mermaid, but far from that, she hasn’t even been in love… Until one day, she meets Naoya who’s come from Tokyo…?! A collection of sparkling love stories!
Also Includes:
Shiawase no Tamago
Shiawase na Ketsumatsu