Sidequest: In Realms Ungoogled - Frank J. Fleming - Bog

Terrance Denby adores his girlfriend, but he suspects she might be evil. It's the little things - like how she wears demonic armor and serves some force called "The Darkness" - that give him pause. Terrance has begun to notice other odd things. It all started when he was bequeathed a sword by faeries on his way to work (was that weird?). Now he can't help but be bothered by perfectly normal things, such as a nearby sinister fortress on a volcano and a company meeting involving a human sacrifice - though no one else seems to share his concern. That is until Terrance finds a group of regular people who want him to join in the fight against the evil they're sure has imprisoned the world. And he just knows that's going to be a problem with his girlfriend.