Of this manga, I only read the last chapter (I guess it had some extra too but that wasn't scanlated).
Here's what my memory could make our of the story. Guy 1 has supposedly rejected guy 2 and now guy 2 had left[img] Japan for good. When he goes away guy 1 cries a lot ?? And says that he really was in love with guy 2 but now that he had rejected him there was no way they could ever get together. And because of all that he wasn't able to concentrate on his work (don't remember what work..he stood behind a counter I think). Then when he's brooding guy 2 comes back and surprises him by saying that he never left and that he just couldn't accept the rejection.
Guy 1 then ask him if they get together again and I guess when he was saying this he was crying??
They do "it" on the spot and guy 1 was saying that someone might come (guy 1 was at his work place)
After all that guy 2 asks him about the portrait hanging on the wall (it was a painting or photograph of the sea...maybe it had a ship in it too??)
I now this is too vague but forgive me.
A reminder again-these all are the events of the last chapter.

Never mind. I found it. It was Focus (NISHI Noriko)
And I made a mistake in the description. Guy 2 wasn't leaving Japan; just the island where they used to live.