Fetish.
It is a form of sexual desire in which gratification is strongly linked to a particular object or activity or a part of the body other than the sexual organs.
Why did he explain this now?
It was because he understood Rias's fetish now.
As Rias forcefully kissed his lips, he could see her intoxicated and happy when she saw his gaffe.
When he saw all of this, he was sure what her fetish was.
Best of the best.
Yes, Rias had always wanted the best.
Whether it was her family, older brother, appearance, talents, or everything around her, Rias got the best thing that most people could only dream about in their sleep easily.
It was also the reason why she fell for Issei since he was the best among the best.
He was the strongest.
Even if Issei was a pervert, it didn't change the fact that he was strong.
So, those strengths were enough to make Rias fall for Issei since he satisfied her fetish and vanity.
However, it was different now since Issei had lost to him so many times.
Moreover, he also decided to divorce her and marry her best friend.
As someone whose nature was more prideful than anyone, how could Rias accept all of that?
Being constantly tortured by failure after failure, Rias felt a sense of bliss when she saw the one that stood above everyone was in a gaffe when she kissed him.
"...."
While he was speechless, he enjoyed this kiss and was about to insert his tongue, but he quickly regained his clarity and pushed her away.
"You bitch! What are you doing?!"
Riser was about to marry soon, and the place where they kissed was full of people.
If someone saw he was kissed by Rias, then what would happen to him?
He was afraid that Serafall might freeze him to death!
Being pushed by him, Rias didn't get angry and even felt proud. "Riser, why were you getting shy like that? Didn't we kiss several times before?"
"That was the past!"
Riser really wanted to beat this woman up, but he endured it since he couldn't fight her older brother. He might be strong, but it didn't mean he was strong enough to fight Sirzech.
Nevertheless, he also felt weird since the system didn't give him a quest when he was kissed by Rias so suddenly.
[Just enjoy, okay? It's not like you will lose something when she kisses you]
"....."
'I've lost my innocence, and my mental health is damaged!'
"....."
The system was speechless since Riser was more shameless than it had thought.
"Really? But didn't you enjoy it? You were about to put your tongue inside my mouth before."
Yet, Rias wasn't deceived by his bluff since she knew this guy was still attracted to her.
"Rias Gremory."
His tone was solemn and cold. "I was about to marry Sona Sitri, your best friend. I am about to become a married man. While we might have engaged before, we no longer have that relationship now. We can pursue someone that we love without being worried about anything now.
"Didn't you like that Sekiryuutei? Then, go ahead and marry him. Don't bother me any longer."
Then, he looked at Akeno, who was looking in his direction. "Hey, Gremory's Queen over there."
"Ah, eh, yes!"
Akeno was startled when Riser suddenly called her and quickly recovered from her deep thought.
"Take care of your master. Don't let her mess up my wedding."
"...do you think I can control her, Riser-sama?"
Akeno showed a pitiful expression and asked.
"....."
Riser's lips twitched, and he felt helpless. He then looked at Rias, who didn't seem to fear anything, as if she was ready to destroy everything while killing herself.
"Rias."
This might be the first time he called her given name after they parted since he usually called her by her family name, so Rias, who heard her given name being called, felt a strange feeling in her heart. She didn't hate this feeling and quietly looked at him.
"I apologized for shaming you in front of everyone. Due to my actions, I know that I have caused you many troubles, but this is something that you wish, right? You don't want to marry me, and I won't force you to marry me.
Now, I am about to become a married man, and being with you might cause a misunderstanding. I hope you understand my position and respect yourselves. Don't give your kiss so easily like that since I will look down on you."
Rias flinched when she heard his last words.
"I know that with your nature, it is impossible for you to forgive me, so I won't ask for forgiveness, but as your former fiance, I hope you are well.
"Farewell."
Leaving those words, Rias saw he left without any hesitation like before. She gritted her teeth and shouted, "Riser, you are going to regret it!"
Riser only waved his hand and continued to walk.
Grinding her teeth, Rias shouted once again, "If you stop this marriage, then I will give you my everything!"
Riser didn't stop.
"RISEEER!"
Rias became even more desperate, then asked, "Do you love Sona that much?! Don't you like my breasts?! My breasts are going to be yours!"
Riser almost staggered before he sighed helplessly.
"If I say that I love her with just a limited amount of time, then I will be irresponsible, and my love is really cheap, but as she will be my wife, I will make her happy, and I am trying to love her, so don't bother me again."
He took a deep breath and then quickly left since he was afraid that if he continued to stay, then he might not be able to explain his situation in case someone watched them.
Watching him, who left as if running away from her, Rias felt even more frustrated.
Why? Why? Why?
Rias continued to ask this question as she had an urge to destroy everything.
"Rias."
It wasn't until Akeno said something that Rias woke up.
"His wedding is about to start. We should be there soon since your family is waiting for you."
"...I know."
However, Rias still felt unsatisfied since everything didn't go according to her wish. The guy, who used to be her fiance, pleased her and wanted to rub her breasts crazily, was no longer obsessed with her.
Yet, how could she accept that?
There was no way that she would give up!
Even if he had married, so what?
She was sure that she could make him fall under her skirt and fall helplessly like before.
"What are you going to do? He is about to become a married man, you know?" Akeno asked helplessly.
"Isn't it fine? A married man is more attractive."
Rias answered brazenly.
"Well, that's true." Akeno nodded in agreement.
"..."
Rias stared at Akeno in disbelief.
Akeno chuckled. "I was kidding. There was no way that I would have such a relationship with your former fiance, right?"
"...you should since I won't forgive you if you do so."
"Yes, yes."
Akeno smiled and then helped Rias fix her make-up and dress. "Let's fix up your dress and make-up first. Don't you want to appear as the most beautiful one?"
"Okay."
Rias nodded and agreed before she walked to the restroom.
Nevertheless, she didn't realize that Akeno's expression was quite weird at this moment as if she had imagined something.
Akeno squeezed her legs as if she were holding something before she let out a hot breath.
"Akeno?"
"I am coming."