Natsukage Ni, Sayonara

Hoshikuzuu scans: A rural village by the sea. And an oceanside house that only opens during the summer. Even if time goes by, we will never forget that summer…
The summer before college exams, Fuuka suddenly decides to work a part-time job at a beach house. There he meets the large family that owns it and the youngest of that family who is two years younger than him, Jun. Jun is always crying or laughing and so full of emotions, that it gives him grief. But he still takes care of him. He knows that they will need to part when summer ends, but his heart will always face Jun.