What's the name

I'm looking for yaoi manga where one of the guys lives with his grandma on an island, has run off from an engagenent and falls in love with a highscool boy, who often sits on a bench out side by the beach. this boy has just lost his mom, he then goes to the mainland and comes back after two years i think. in the sevons book/volume the couple visit the older mans family as they where told he was sick and after some time get busted having sex by his little brother.