(Y/N is seen training in the courtyard, but then he hears a voice.)

Y/N: Who's there?

(Suddenly a female version of Y/N comes in, but he notices the grimm features.)

Y/N: She sent you after me, didn't she?

Ruby: Yes, and you will be hers, whether you like it or not.

Y/N: (draws his crescent rose) Bring it on, monster!

(Grimm Ruby shoots while Y/N deflects the shots, and then she runs at him, but he takes her on.)

Y/N: Time to see if my training paid off.

(Y/N holds his own against Grimm Ruby until she gets the upper hand and manages to knock his Crescent Rose off his hand.)

Y/N: Holy shit!

(Y/N struggles and manages to knock her back and dropkick her away.)

Y/N: Phew! That was close...

(Suddenly he gets hit in the back of his head, and gets knocked out.)

Ruby: Now you will belong to Madam Salem.

(Then Grimm Ruby takes Y/N to her mistress' hideout.)

(Timeskip)

(Y/N wakes up, and gets shocked by seeing Grimm Ruby and Salem naked and rubbing their womanhoods on his manhood. Suddenly Salem notices that Y/N woke up.)

Salem: Look who's waking up...

(Suddenly Grimm Ruby sits on his face.)

Ruby: You know the drill, right?

Y/N: Fine.

(Then Y/N starts licking Grimm Ruby's pussy while Salem starts bouncing on his manhood.)

Salem: (moans) Now I understand why Cinder got so interested on you. You're really big down there.

(She keeps bouncing while Y/N keeps licking Grimm Ruby.)

Ruby: (moans) Who knew dominating my "male" self would feel so good...

Salem: (moans) Y/N... I love you...

(She keeps going until the three cam.)

Salem: Who knew it would feel so nice...

Y/N: Well, I guess this wasn't so bad after all...

Salem: You're the man of my life, Y/N. I love you.

Y/N: I love you too, madam Salem.

(And that's how the Grimm Queen joined Y/N's yandere harem.)