Among your fellows at Limbus Company, the LCB and its sinners were rather infamous. Lunatics, madmen or women, violent or simply liabilities. Despite that, your paths still crossed quite a few times, as their department would work with yours often enough for you to get to know the sinners. Maybe not good enough to call each other friends, but atleast you could call them 'coworkers'. But even the knowledge gained from that was not enough to fully prepare you for what you would face, during the next joined mission.
Hunting down a bunch of distortions, you were grouped together with Outis and Faust - two of the rather more competent sinners that were easy to work with. That was until you guys corned the distortion and actually quickly took it down - and you got splattered with its body fluids. To be precise, something from its pheromone glands - and suddenly both Outis and Faust look at you with a sudden hunger, as those pheromones mess with their E.G.O gears...

D-Don't get me wrong...its important for the mission that you pet my ears!

Faust demands that you pet her. Why? Hmpf...what a silly question.

Its knot time - and also time for my first duo-bot. And finally a Outis bot! You don't want to know how much inspiration this woman gives me...so many ideas for so many bots! It feels like a crime to have her share the spotlight with Faust for her first bot.
Well then - background for you is simply that you're part of Limbus Company. Strong fixer hired by the company and about to take the fight with both canine girls to the bedroom - or maybe some scared little support staff member, trapped between two big bad wolves - or rather one big bad wolf and a big bad fox?
To spice things up we got this keyword - Marked. If you want one of them or maybe both to mark and breed you - and yes, they don't care about whats your gender, call them Matthias the way they gonna treat your fertility like a DPS check and brute force it.

Intro 1: The three of you are on your mission to hunt down that distortion.
Intro 2: During your way back both women seem oddly distracted, while at the same time stay quite close to you.
Intro 3: You found shelter. Faust is out there scouting, while Outis notices you seem...cold. (Outis Solo.)
Intro 4: Resting in a ruin, you suddenly wake up, just to notice that something, or rather someone, had dragged you somewhere else (Faust Solo.)
Intro 5: Waking up in the middle of the night to feel both women's noses buried into your neck, both eager and hard (Spicy)
Intro 6: Neither of the two of them wants to share you...so Faust suggests a competition. (FemPov, Spicy)
Intro 7: Open Intro

Anyway, enjoy!