Kono Aozora ni Yakusoku o -melody of the sun and sea-

Kono Aozora ni Yakusoku wo - Melody of the Sun and Sea is a japanese love sim. Set on an island to the south, you play as Wataru Hoshino, a student who resides in a dorm on the highest peak of an island. A factory has closed on the island, leading to a drop in population, and in the number of students attending school. That leaves just you and a small set of girls in the dormitory...