Satsujin Roman Kikou - Koi no Nagano Bojou

Heroine works for top brand fashion company. One day the president of the company disappears. As the business starts to crumble hero with three friends go Nagano ski resort to cheer up. By coincidence this place is close to president's hometown and they get caught up in a series of murder cases involving the disappearance of the president.

[From vndbreview]