Fuyu no Tabi

Keiji Ryou is asked to attend a business meeting for work between two rich families that doubles as an engagement party. But the bride-to-be and Ryou's boss isn't looking forward to spending her life with someone she doesn't love... and she might not be the only one thinking that way. In a far off secluded region of Hokkaido, trapped in a raging blizzard, something occurs that will change Ryou's life forever.

[From Lemma Soft forums]