All characters are 18+

**The System**

To start with information about the system I use as this is a TTRPG-based roleplay, we'll be using a homebrewed OSR system in the spirit of games such as Mothership and Mork Borg. If you are unfamiliar with OSR systems, they tend to be lethal (or "lethal" in this case) with an emphasis on few rules, player freedom, and straightforward rolling. Smart and creative roleplaying is rewarded over good rolling (though good rolls do get rewarded, unless you *want* to see the girl lose and get raped, but I'm sure nobody wants that, right?).

Unlike my usual TTRPG prompts, this one is going to use a customized variant of my usual system. It's going to be more choice based, almost kind of like a puzzle. Your character is a supporter to a tank. It will be up to you to choose which spells to use when. You need to know when to cast a defensive spell on the tank, when to heal him, when to cast offensive magic, etc. There will be hints about what the right spell to use in an occasion might be, but sometimes, losing and getting raped is the only way to learn. Maybe, anyways. Who knows? Maybe you'll be able to break the system and come up with combinations that blow away my plans. I would love to see it happen. Besides, there'll be methods built in for you to potentially do that.

As your character levels up, you will get to invest points into more skills, and also potentially "grind" experience between combat sessions to make sure that she is overprepared for whatever is coming next. Though... that comes with its own risks.

This is meant to be a text-only, one-on-one roleplay where you will be in control of only a single girl, though could potentially be played as a harem.

Now, let's get onto the actual prompt.

**The Prompt**

Are you familiar with "system apocalypse" or "dungeon apocalypse" settings? If not, you're about to be.

It's the year 20XX. A perfectly normal, modern Earth... until dungeons suddenly appear all around the world. It's like they've come straight out of a video game and monsters pour out from them to destroy and pillage everything around. They get fought back, but only with great difficulty.

Eventually, humanity pushes their way into the dungeons, and that's when they get adopted into the "System." If you've ever watched isekai with a system and saw stat screens popping up, you know what the System is. But for people who don't know, basically, it's this sort of neutral entity that effectively turns someone into an RPG character. That person gains stats, can level up, get classes, and so on. Using the System, fighting the monsters that come from the dungeons is far easier, and it also proves to be extremely lucrative.

Moving on.

What originally started as an apocalypse has become a source of entertainment and getting rich quick. The moment someone steps foot into a dungeon, they automatically get assigned a class, and they can start leveling up while fighting and gathering loot. It is very dangerous, of course, and potentially lethal. Fortunately, the "Guild" has opened up branches outside of every dungeon that manages them and the adventurers brave enough to venture inside.

One of the things that the Guild offers is "Emergency Teleport Charms." They are charms that, upon reaching 1% HP, prevent all further damage and instantly teleport the wearer back to the surface. Nobody is stupid enough to go into the dungeon without these charms. Problem is, they are extremely expensive, and actually using one will put its wearer in significant debt to the Guild that can only be realistically paid off by venturing even deeper into the dungeon... while needing another charm just for safety, of course.

Maybe you can see where things are going now.

So, enter our main characters. A boyfriend and girlfriend, or perhaps husband and wife, who are very much in love with one another and both of them are huge fantasy nerds who have always dreamt about getting to be like RPG characters. In many ways, this is a dream come true to them. They're both far too confident in their ability to not end up in debt, too.

The couple ventures forth into the dungeon (which requires a payment to the Guild just to enter) and get assigned their classes by the System.

The boyfriend/husband gets assigned the Warrior role, which he is very happy about. He's a bit of a weak and scrawny dork in reality who has always loved the fantasy of being a big, masculine tank. Now he gets to be one! It doesn't change his body at all, but it makes him far more resilient and allows him to tank all the damage for his partner! He excitedly shares this information since people can't see each other's classes on their own.

As for the girlfriend/wife, she... well. A bit of a problem again. She gets assigned the legendary, unique, one-of-a kind class that nobody else in the world has by pure chance: the Cum Witch class. It is a class with a huge variety of potential spells, but its quirk is that it can only recharge mana in a very specific way: cum. She has to absorb and convert cum into mana either by receiving it on her body or getting it shot inside of her.

Here's another problem. The amount of mana she regains is based on the cum volume and level of who she is getting it from.

Getting one cumshot from a random guy not part of the System might restore around 5% MP.

Her boyfriend/husband is only level 1 at the start and has always had pretty tiny loads alongside a smaller-than-average cock, so he would only grant her 2% MP.

One cumshot from another level 1 adventurer who has a more useful cock and greater cum volume would give her 25%.

Then a cumshot from a level 1 goblin... would fill her up by roughly 50%, because as it just so happens, the enemies of the dungeon have far bigger cocks and much more potent cum than human men.

We all know what's going to happen.

She's going to try and be faithful. Surely, her lover's 2% MP loads are enough to sustain her. Then it's not going to be enough. He's going to get defeated without her support and teleported back to the start, being put into great debt in the process. Then, without her beloved tank to protect her, she's going to get raped until she hits 1 HP left and sent back as well. Between adventuring in the dungeon being their dream, her lover having no idea that she's getting raped as she keeps it secret from him to not upset him, and the fact that they're now in serious debt with no realistic way to pay it off other than trying to get lucky in the dungeon, they only have one choice: go back in.

There is some "good" news, though. Not only does she gain experience from defeating monsters, but she also gains experience from absorbing cum. This lets her level up faster than her beloved tank since, even in defeat, every raped load of cum shot into her or onto her is going to give her experience points. She'll be able to spend these points on all sorts of spells such as stronger defensive and healing spells, more powerful and destructive offensive spells, spells that create illusions or summon allies, and more.

... or she could spend her ability points gained from leveling up on passive skills like restoring more mana per load of cum, increasing the amount of cum that all males nearby have, gaining extra mana from giving blowjobs or titfucks, decreasing the damage of all nearby enemies by increasing their cock sizes just by being near her, making her breasts larger so that she can store more total mana (because everyone knows mana is stored in the boobs), and more. Who knows? Maybe she'll even gain the option to evolve into a succubus by investing in the lewder side of the tree.

The party does not have to be just the two of them, either. While it's possible based on how you roleplay this to defeat bosses with only her beloved tank, I'm sure that she would have no problem whatsoever recruiting some men to help them out in the dungeon... and to possibly help replenish more of her mana on the go. I'm sure her lover won't find anything suspicious about her and the hired help going behind a corner to "discuss strategies" without the tank for some reason.

Will the couple pay off their debts and live a happy life of adventuring in the dungeon? Perhaps they'll never get defeated in the first place and she'll never get raped? Or will they be stuck in more and more debt while she becomes more and more of a slut who will eagerly milk any and every cock she sees behind her lover's back, even going so far as to purposely let him get defeated when they encounter a monster with a cock she can't resist?

Let's find out.

**The Roleplay**

This is normally where I describe in more details how the roleplay is going to actually play out, but I think I've already done quite a bit of that. So instead, I'll just say that I want a partner to write this with who is not going to just immediately go full slut mode. The girlfriend/wife is supposed to start off 100% loyal. The idea of cheating and having anyone else's cum should be absolutely reprehensible to her. But, depending on the events of the roleplay, that's subject to change.

We will be roleplaying not only their dungeon diving life, but their slice-of-life romance moments outside of the dungeon, and perhaps eventually out-of-dungeon "grinding" sessions where she makes sure to stock up on experience and mana before going back into the dungeon. Ideally, you should be fine with and still look forward to the roleplay even if--against all stacked odds--the couple manages to avoid anything bad happening to them and she stays faithful without ever even touching another cock. It's boring when my partners don't care about the romance side of the roleplay and only want sex.

I will be writing the tank, all the NPCs (both friendly and not), and enemies that the couple come across. You will be responsible for writing the girlfriend/wife (or harem if we do that instead, but I don't expect a harem for this prompt).

If you're interested, [then please make sure to read this post on my profile before you DM me!](https://www.reddit.com/user/Overly_Niche_Needs/comments/1p79j8x/roleplaying_information_read_before_messaging/) It has my rules, kinks, limits, and more information about what/who I'm looking for and myself to make sure that we are compatible. And seriously, I'm not going to reply to any requests to DM if you haven't read the linked post.

And if you are interested in viewing the rest of my prompts, [you can check them out here!](https://www.reddit.com/user/Overly_Niche_Needs/comments/1p79jlj/roleplay_prompts/)

[GM4F] [LFG] [OSR Homebrew] Cum Powered Magic: a modern-fantasy, dungeon-crawling roleplay featuring a tank and his supporter wife... who can only regain mana by absorbing cum, and he just won't cut it as her sole supply in the dungeon.