(Y/N used to date the most beautiful girl at Kuoh Academy, but everything chenges when she decides to break up with him.)
Y/N: What? Why?
Rias: I should have said this before, but... I'm engaged to Riser.
Y/N: Riser? You mean Riser Phenex?
Rias: Unfortunately...
Y/N: (sighs) Alright, I understand... and also, I hope you can be happy with him.
(Y/N walks away saddened, leaving Rias, who tries her best to hold her tears.)
(Y/N moves to America and meets a black haired girl.)
Y/N: Hi... I'm Y/N L/N.
Alice: My name is Alice Angel. (notices his sadness) You seem sad. What's going on?
Y/N: My girlfriend just broke up with me.
Alice: Why would she do this?
Y/N: It looks like she was already engaged, and didn't tell me that before.
Alice: (stern) The nerve of that bitch. Tell you what, how about we hang out for a while. You'll feel much better.
Y/N: Well, okay...
(Then Y/N and Alice start hanging out. Each date had helped Y/N to move on from Rias. They even confessed their feelings to each other. What they didn't know was that once they returned to Kuoh, they'd be in for a nasty surprise.)
(Cut to Kuoh, Rias had become depressive ever since she broke up with Y/N.)
Rias: Why did I do this? I didn't even want to marry that douche.
(Suddenly she hears the crowd, which attracts her curiosity. What she saw, shocked her drastically. Her ex is seen with Alice.)
Rias: (in mind) Am I dreaming? Did he really get a new girlfriend?
(Then she gets angry)
Rias: (in mind) No... he's supposed to be mine... MINE! MINE! MINE!
(Rias then attacks Alice, who shields herself, and the other students watch in horror.)
Kiba: President, what are you doing?
Y/N: Rias, stop!
Rias: No. I know what I did, but I regret that.
Y/N: If you did, you wouldn't have tried to kill her.
Alice: Face it, Rias. He moved on. He's mine now!
Rias: (angry) You... YOU TAINTED HIM, DIDN'T YOU?
(Rias is about to try to kill her, but Sona comes in.)
Sona: ENOUGH!
(Everyone backs away, except for Rias as Sona glares at her.)
Sona: Frankly, Ms. Gremory, the staff would say they expected better from you if they witnessed that!
Principal: (comes in) Rias Gremory, in my room! NOW!
(Rias reluctantly goes to the principal's room, but turns to Y/N.)
Rias: This isn't over.
(Timeskip)
(Y/N is seen returning home.)
Y/N: I wonder how Alice is doing. (sighs) I'm worried Rias might try to do something bad to her again.
(Suddenly he gets hit in the back of his head, and falls down.)
????: (smirks) Now we can finally be together again, my love.
(Y/N is taken away.)
(Some hours later, Y/N is seen tied up in a bed, and looks around, only to realize that he's at Rias' room within Gremory Household.)
Y/N: I'm in her room. (struggles) I have to get outta here.
(Suddenly Rias come in, wearing only undergarments.)
Rias: Hi, baby.
Y/N: Rias, let me go.
Rias: Nope.
(Rias then kisses Y/N on the lips.)
Rias: You belong to me forever.
Y/N: What about your engagement?
Rias: I didn't want to marry him anyway. The only one who I want to marry is you. And besides, I killed him myself!
(Y/N's eyes widen in shock.)
Rias: I love you, Y/N. I really do. I'll never let you go again!
(Then she inserts his member into her vagina and starts bouncing.)
Rias: (moans) I knew it, that feels so good.
Y/N: Rias... stop...
Rias: No, Y/N. I won't stop. Not now, not ever.
Y/N: You broke up with me, remember?
Rias: I regret that mistake, and that's why I'm kaing up.
(She then kisses him again thile bouncing faster. His member eventually twitches.)
Y/N: (muffled) Rias, if you keep this up, I might cum soon.
Rias: (muffled) Inside of me. Impregnate me, baby.
(Then they cum as they moan loudly.)
Rias: That felt so good, now we'll be together forever.
(Y/N pants as a tear falls from his eye. He knows he won't have any other choice but being hers.)
(Some weeks later, Y/N and Rias married and they had two children. Y/N never left Rias again.)