They make her the club slave (Futadom Route)

Monika shuts and locks the door behind her. "That's great. You'll make an excellent slave."

Samus "Slave?!"

Natsuki "Well duh. This is a futa club, obviously the futas are in charge slave."

Sayori gropes Samus' breasts "Thank you so much for agreeing. I promise to give you lots of orgasms." Samus reacts and grabs Sayori's wrists to push her off her chest but Monika interjects.

Monika looks Samus in the eye as her own glow pink "Uh, uh, uh Samus. Now that you're the club slave you have to obey us and lets us play with you however we want." Samus feels her mind fall under her control as that new rule is set in stone in her head. Her hands let go of Sayori automatically.

Yuri smiles, she was the one who more often than not was on the receiving end of the other girl's cocks but now there's someone else on the bottom of the club hierarchy and she was going to enjoy this. "Our new slave needs to understand her new role here. Samus, strip for us. You need to earn the right to have clothes."

Sayori lets go, wanting to watch. Samus' moves automatically as she begins slowly taking off her school uniform. Her mind races 'Damn it! I should have known Monika would pull something like this. Now I'm a slave to 4 futa teenagers. Having to fuck their cocks... at least all four are good looking. Damn, even this is still making me horny. Even if I was still free back in my world I'd probably still try seducing them.'

She is down to her underwear. A light blue bra and panties made to look like her zero suit. She undoes her bra letting the girls see her d cup breasts. Natsuki licks her lips, already imagining her cock sliding between them as she idly strokes herself while watching. Finally Samus turns her back to the girls and bends over at the waist giving them a great view of her supple ass. She grabs the hem of her panties and slowly pulls them down, wiggling her hips slowly as her pussy and ass are now on display. She steps out of her panties and tosses them at the girls. Sayori eagerly grabs it out of the air and holds them up to her nose sniffing Samus' juices before wrapping her cock with the panties and stroking herself with them.

Monik approaches with something in hand. "Kneel, Samus." Samus drops to her knees as Monika stands in front of her and holds a leather collar with a tag bearing a male and female symbol in one. "With this collar you will now and forever be the slave of the futanari club. You will follow our orders, please our cocks and accept our cum in all your holes. Put on your collar slave."

Samus notices that she isn't moving automatically. Monika must want her to do this herself. Looking over the girls their expressions are overcome with lust as they all stroke their cocks furiously at the idea of having a slave. Samus looks at the collar. If she puts it on there is no going back. She will become their slave and forever lose any chance of reclaiming her old life as a bounty hunter. Although as twisted as this is being under Monika's control she knows why she did this. Samus always imagined retiring to a planet with a native species that are all hermaphrodites and spend her life surrounded by futa cocks. And now she that's been realized as she is surrounded by cocks just ready to fuck her crazy. What the hell was she hesitating for? Samus reaches out of her own volition and grabs the collar noticing that it has a built in lock she imagines only Monika has the key for. She slowly opens it and wraps it around her neck tightening it as the lock keeps it shut tight on her throat.

Monika grins, happy Samus is finally choosing to go along with her will. "Alright girls, let's welcome our new sex slave Samus Aran!"

Samus looks up at them as she realizes how they are about to welcome her. All 4 girl's balls twitch and churn as they all orgasm at once, their cum soaring through the air towards Samus who opens her mouth in shock. The combined cum splatters Samus body as her breasts and face are covered in the sticky semen. Her open mouth catches a large glob of spunk as well as her tongue begins playing with it, moving it around to coat the inside of her mouth in their surprisingly tasty fluids. Monika must have made it so they make not only more cum but made it more tasty too. Even the cum carton she drank at lunch is nothing compared to the taste of it fresh from the tap.

The futa club looks down at their new slave and smile. Now that the initiation is done they can have some real fun.