Kinou no Yume o Yoru ni Kaeshi

Hiro is a grade school teacher and lover of Kurou, the son of a company president. One day, Kurou brings the news that to save his father's company, he has to break up with Hiro and agree to get married to a rival company's president's daughter. Hiro wishes him luck in his future marriage. It's been months later. Hiro thinks about Kurou sometimes but he has other people he can depend on.....

[From Aarinfantasy Forums]