I need help identifying an old eroge title, it had a short cut blue haired older woman as one of the heroines, who sleeps with a scientist lab coat guy on her route before she and the protagonist get together. I think the story has something to do with some ancient artifact or something.

The eroge was released for either windows 98 or XP.

please and thanks

EDIT: managed to find it, "Vist" by C's Wares, art by happoubi