Light Slime (Complete, 21 chapters)

Quick reference:
Arcane, Massive, Slime, All The Cocks, XP Cheat.
Elemental Infusion [Light], Ranger[Humans].
Respect Sacred Ground: Domain, Immaculate Conception, Pure Land.
Love Humanity: Warmth, God's Eye, Ariel's Alma.

This is a Make Love Not War playthrough; our unnamed slime protagonist will try not to go too dark, though we'll see how well that works for him.
I skipped over the description of the base powers because we've all read the CYOA from https://chyoa.com/chapter/Introduction.1032178 .
If you haven't read the CYOA, now's a good time to do that!

Our protagonist isn't a fan of the CYOA format, but that's his opinion and not mine.

It's the longest isekai intro you've ever heard.

It's the only one you've experienced personally, of course. But you watched a fair bit of anime as a teen, and a fair bit of that was isekai, and none of it had anything like this many choices. You're still struggling to cope with being dead, and then with not being dead after all; having two goddesses carefully explain the difference between a "therionic" versus "erosarkic" monster heritage is taking more mental resources than you really have available. The only saving grace is that they seem happy to go over it more than once.

"Can we take a break for a moment?" you ask, partway through the third repeat. It feels like you've been at this for hours; you really wish there were some sort of diagram you could read all this information off of. "I, um, have some questions more basic than this." Like, anything to not have to make a decision for a moment. "How... many people do you do this to?"

The purple one replies immediately. "You have been blessed, mortal! We selected you, out of all the men of Earth, for the purity of your conviction and the strength of your soul!"

The yellow one smirks. "Lol. We don't get Earth souls that often here. You guys have to die just right for your soul to fly off in just the right direction. You're the first we've picked up in over a century."

"Insolent!" complains the purple one. "Mortals need to believe they are special, or they lose hope. Shatter not his confidence!"

The yellow one shrugs. "It's true that you guys have good souls, though. Something about growing up in a no-mana world really forges 'em. We use you guys as heroes for a reason."

Watching them quarrel makes you feel just a tiny bit better. They're goddesses, sure. Eldritch beings of immense power, unfathomable and ancient and terrifying. But they also sound a lot like Anne from back home, arguing with her roommate over where to order takeout.

You'll never see Anne again.

Despair washes over you for a moment, and a decision crystallizes. Just a small one, but it's a decision.

"Okay, I've decided," you say. "I want the big size. The really big one. You said that one had more cores, right? More... brain? I think I'm going to need that before I choose anything else."

"Heh. Righto," the yellow one smirks. "You want that now? Want us to blow you up into a giant sixteen-ton squishy human? Because there's a thing you should know about called the square-cube law..."

"Okay, a few more decisions," you agree. "The slime body. Arcane whatever, the one with tentacles. All the cocks. And the experience cheat."

You'd really wanted to think the slime body over for a bit, but you've always been certain about the tentacles. If there's going to be sex, you're going to make sure your equipment is nothing less than the best.

Also, if the heroes are as overpowered as it sounds, being a slime sounds like it might give more survivability. If you get killed, they might... miss part of you?

"So be it!" the purple one declares. "Fiat monstrum limaceum!" She slams something into your chest, and the world dissolves in a haze of pain.

When you can think again, the room feels much smaller, somehow. The goddesses look smaller, too, but somehow they feel brighter, like being in the same room as a sun. Colors are different. You've stopped breathing, and that seems to be fine. But, most importantly, you're thinking much more clearly. All the grief is still there, but it's comfortably packaged away. Maybe your other brain is dealing with it.

Quest: return to consciousness. Completed! +90xp
Quest: choose a monster power (1) [900xp]
Quest: choose a class (1) [900xp]
Quest: defeat Archbishop Elmeria Levantine [90Mxp]
Quest: defeat Amazon Queen Alkadabuki [90Mxp]
Quest: defeat Arch-Imago Citrinas [90Mxp]
Quest: defeat Runa Ruya, The Redeemed [90Mxp]
Quest: defeat Hero Tomoko Sakurai (1/3) [90Mxp each]

Text scrolls down your vision, line after line after line, until you make it vanish with a thought. It seems the experience thingy is working.

The purple goddess -- Melanoche? -- frowns cutely. "Should it be taking this long?" she asks. "Mortals are so fragile. I do hope his mind is intact."

The yellow goddess, Carnachias, grins. "He's still in there. He's just not talking to us. Probably playing with the gamer hud. But watch this!" She reaches out a hand and strokes your slime-body.

Mana floods into you. Sweet, pure, impossibly delicious. Is all mana like this, or is this what a goddess's mana tastes like? Your whole vast body ripples in delight. "Lol," she says. "That's right, anon. Suck that mana! Slime powers, activate!"

"I can hear you, you know," you rumble. Your voice is deeper now. You actually really like it.

"There he is!" Carnachias cheers, pulling her hand away. "Welcome back, anon! How do you like your new form? I hope it's lots, because it's irreversible!"

You ooze toward her, trying to touch her again, to recapture that flow of mana. An invisible wall holds you back. "Keep your tentacles to yourself, anon! There'll be lots of mana sources soon, if you're a good boy! A good ****-monster-slime-boy!"

You liked Carnachias more when she was teasing Melanoche rather than you.

Melanoche clears her throat. "Now then. There are more choices to make, mortal. If you'd care to review the options for monster powers and classes? We'll then proceed to the discussions of equipment, skills, and starting area. Or we could move straight to subspecies specialization, which is by elemental subtype, role, or biome..."

You manage not to laugh. They haven't had an isekai candidate in over a century, and yet they've got this whole system built just for you? Earlier these goddesses reminded you of Anne, but honestly it's more like your otaku friend Dave, who'd spend weeks building elaborate rules for a homebrew RPG and then explain them at length to whoever would listen.

As Melanoche goes over the monster powers again, you bring up the experience thing in parallel and flick through it. There are so many quests here already! They're split out by type -- Story, ****, Enslavement, Conquest, Survival, ****, Collection, Experience.

You direct a mental glare at the "****" option. Ew. Really? You might not be above doing a certain amount of... aggressive persuasion, especially if the woman seems to be into that. But forcing someone who hates it? No. That's not your kink.

Probably no.

Under your gaze, the "****" option changes to "sex". Better.

You sort your new quests by value, and the top two leap out at you.

Quest: have sex with Dark Goddess Carnachias [900Mxp]
Quest: have sex with Dark Goddess Melanoche [900Mxp]

Your whole body quivers for a moment. That's ten times the reward for killing one of the Five Heroes. They're both super cute. And their mana is so very sweet. You reach a decision: the goddesses have plans for you, but you're going to make plans for them, as well.

The next question is: which of the goddesses can you persuade to help you fuck the other?