Stranger by the Shore

Mio is a high school boy who lost his parents at an early age. Shun, a gay aspiring novelist living near Mio's house on a remote island in Okinawa, noticed Mio sitting for hours on the beach. They grew closer to each other, but Mio had to leave Okinawa. Three years later, Mio returns to face his feelings.

Super sadly this is the only one of its kind