Great game.
You can choose if you play a male or a female character.
As a girl, it's a pure lesbian route. At least so far, but the MC is a 100% lesbian, so I don't think there will be any M/F contents.
I'm only interested by the female MC (Kylie) and the lesbian route (female protagonist and lesbian were the 2 tags that caught my attention for Mythos). So I'm only speak for the version of the game with the female MC.

The story is good.
It's takes place in modern Baltimore (2020).
It's start as a death investigation. Your ex-girlfriend was found dead, and you feel something is wrong.
But slowly, you are drag into fantasy as you find out there is a magic world hidden in our own world. And that the death of your ex may be connected with that.

The writing is excellent. Teri (the dev, who leaves there) include some elements like names of places, Baltimore accent, etc, that make the whole thing lively and realistic. There are even some tribute for other adult games.
The choices you make have some impacts in the rest of the story.
The MC isn't a brainless cumslut. And she as a good sens of humor.
The girls you meet are sexy and interesting, each with her own personality.
There are some sex, but it's not the main focus. So if you only seek for lewd actions, it's not a game for you. But if you want to solve a mysterious murder, discover a fantasy world, with some adult contents, and some humor, I can only recommend you to play it.