In the Canis universe, there are two BL storylines that eventually overlap:
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Dear Mr. Rain and Dear Mr. Hatter -- Kutsuna Satoru, a hat maker, picks up a man collapsed on the side of the road named Kashiba Ryou, who came to Japan to die.
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The Speaker -- follows three boys who were all raised in an American orphanage together. Sam is the book smart and inquisitive one. Hal is brave and confident. Nobu is shy and quiet, but he has a good memory and he's more capable than he thinks he is. The boys realize that something sinister is going on at their orphanage, and they decide to investigate. As a result, they get forcibly separated.