(In the oceans, a siren named Purifier is seen dashing as she tries to run away while dodging some familiar blasts. She keeps trying to run away until she got suddenly stopped, and then slammed into an iceberg several times until someone approaches her. It's Y/N Kisaragi, who was sent in a mission to hunt down several sirens.)

Y/N: You're gonna have a bad time.

(Purifier launches cannon shots, but Y/N teleports several times, dodging the attacks until he finally slashes her chest, making her stagger back as he kicks her down the seas, but uses his telekinesis to slam her into the iceberg, several times again before shooting a Gaster Blaster in her stomach. He then summons several more Gaster Blasters as he's watched by Prinz Eugen.)

Prinz Eugen: Bismarck vas right, this Y/N is really strong.

(She sees Y/N keep on brutalizing Puriier by shooting Gaster Blasters at her.)

Prinz Eugen: He's perfect... I'm going to be his future vife.

(After killing Purifier, he approaches Prinz Eugen, who goes seductive and hugs him while rubbing her left thigh in his crotch.)

Prinz Eugen: I like you, you know. You're so strong, so interesting, so... (smirks) mine. 

(She then kisses him on the lips, and then they return to the Little Garden, where Prinz Eugen takes him to her dorm and locks the door real tight.)

Y/N: Uh... Prinz?

(She suddenly kisses him passionately, and then he kisses back as Prinz wraps her legs around Y/N while their tongues fight for dominance until he pulls back and kisses her neck, making her moan.)

Prinz Eugen: (in mind) Zhat's right, Y/N. Make me horny...

(After kissing her neck and even nibbling it, he is suddenly pushed down to the bed and pinned by her as she proceeds to unbuckle his pants and grab his erected dick as she sucks on the member while bobbing her head up and down. She then pulls out and starts jerking him until he cums in her face. She licks the cum off her lips, and takes off her clothes, revealing her wet pussy)

Prinz Eugen: Now vor zhe main course.

(She then pins him down and inserts his dick into her pussy as she starts moving her hips down making her moan every time she goes down. She eventually reaches her limit as his dick hits her womb. Y/N feels her insides were warm, wet, and tightening his dick. Prinz moves her hips up and down while moaning too loud.)

Prinz Eugen: Ah!!!!!!!! AH!!!! AHHHH!!! OH GOD YES!!!!!!!!!!!!!!!!!

Y/N: I'm about to cum.

Prinz Eugen: Go ahead cum inside me!!!!!!!

(They eventually cum together, and Prinz Eugen cuddles up on him before they sleep peacefully.)