Featuring: Humanoid Grimm, Winter Schnee and Weiss Schnee
"Ngh! Weiss Schnee watched in awe as she watched her elder sister Winter ride a humanoid Grimm and taking his massive 12-inch cock in her ass and his hands groping her D-cup breasts. Her breathing labor as she slams her hips down and her buttcheeks jiggling as she bounced. Weiss' cheeks flushed as she was turned on by the sight and feeling her panties getting moist. 10 minutes had passed and she already wanted a go.
She was not the only one. Two more humanoid Grimm stood by her side, watching the same thing only they had their stiff cocks out twitching. Weiss decided to help them out by grabbing their shafts and gave them handjobs while their friend was busy with her sister.
Since discovering that humanoid Grimm can be incapacitated by having sexual intercourse with female humans or Faunus, Winter decided to train Weiss in taking in Grimm cock in order to capture and study them to research their biology. After arriving in the Emerald Forest, they spotted three Grimm and Winter set an example by going in first.
"Ah, ah~! Just a little more!" Winter moaned as continues to ride her partner. Her asshole had been stretched to its limit but it did little to hurt her, if anything, it turned her on even more. Her tight backside constricting his cock to milk it. Soon, a final slam made her moan loudly as she could feel his cock swelling up in her and spewing hot black splooge in her ass, making her eyes roll into her head and tongue sticking out.
Once the orgasm subsides, Winter collapse against her partner who held her while still fondling her tits but decided to give her time to rest until she can go again. "W-Why don't you handle those two Weiss? It'll be the perfect exercise." Winter breathed out as tried to regain her breath. Weiss gulped as the humanoid Grimm looked at her and their cocks within her hands twitched with excitement.
"..... Okay." Weiss complied and lifted her shirt up and removed her panties, revealing her wet cunt that glistened after watching her older sister getting rammed and now she was about to get the same. The younger Schnee yelped as she was lifted by the two humanoid Grimm and positioned above their huge cocks and before she could protest, she was impaled on their rods at the same time filling her ass and pussy up.
She gave a loud moan as she held to the humanoid Grimm for dear life as they started moving, the one in her pussy thrusting in just as the second pulls out of her ass and vice versa. The one occupying Weiss' cunt held her legs while the one busy with her backside had his hands on her waist as they rammed her repeatedly.
The threesome between humanoid Grimm and Huntress went on and both parties experienced euphoria from it until the formers grunted as their cocks swell up and released their load inside the Schnee heiress. "Oum!" Weiss squealed as she feels her ass and cunt getting pumped by hot liquid and shaking in ecstasy. Cum that her holes couldn't hold began leaking out and forming a small puddle. However, they continued cumming inside her since they were given handjobs before and thus making the cum pool bigger.
Winter, who had recovered, begins riding her partner once again in the same position, only this time it's her pussy. The older Schnee moaned and grunted as she rode him as she raised her hips up and slamming herself down, the tip of the humanoid Grimm's cock poking her G-spot and making her quiver from the sensation. Her D-cup breasts jiggling from each movement she made. His cock slid in and out of her pussy with ease due to the lubrication of cum from earlier.
The humanoid Grimm's hands found their way to her waist as he pulls her down to his shaft and repeating the process. The sound of flesh slapping flesh resonated with those of Weiss' moans as she was still being creampied until now. Though Winter would soon join as he grunts and pulls Winter down for the final time as he cums inside the Specialist. Once again her tongue rolls out and eyes rolled as his cock spews black cum into her vaginal depths and painting the insides white, with excess cum leaking from her stuffed hole.
Eventually, all three humanoid Grimm had their fills and pulled their cocks out before fall on their backs, Weiss being dropped unto them massive black cum puddle though Winter had her partner as a cushion. Their holes leaking with Grimm essence as the Schnee sisters were exhausted from their experience but also satisfied as Winter managed to teach Weiss how to subdue these new Grimm.