Mirai no Kioku

In the Mirai no Kioku series:

V.1 - Mirai no Kioku

V.2 - Kaze no Yukue

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From Deux Press:
Kento Kumagaya wishes for just one simple thing: to have a happy family with the ideal housewife, loving kids, and kind grandparents all living together, happily ever after. Life, however, has other plans. Enter Akira Kazuki, a smart, beautiful and unrestrained gay man who shatters Kento’s dream with a single night of wild and passionate homosexual sex. This is a romantic, sweet and funny story between two different people (in more ways than one) who unexpectedly find the same future together.

Note: also contains an unrelated oneshot called "Winter Rabbit" in the English release by Deux Press.