Last time, we see Y/n was in pain and sorrow because his little brother, Issei, have died of the woman with black wings and something in his head access his potential and say Rias and her peerage.

She used her magic in order to revive Issei and told Koneko to pick him up but Y/n asked her.

Y/n: What're you doing with my brother?!

Rias: We're just taking your little brother back to your house in his room and have to erase his phone number to the fallen angel he met.

Y/n: A what?! We'll talk about fallen angel or whatever, ok? But please, look out for my little brother. I know he's a pervert and claiming that he wanted to be a harem king or whatever that means, but I like him as a older brother and I failed to protect him!

He was about to cry his tears out but Rias walk to him, hold him in her embrace and reassure him that they'll keep an eye on him but he knows that he can trust Rias because she's like a kind soul to him and her peerage because Rias treated them as a family that she cares about.

Then we cut to the morning after Issei's death, Y/n woken up in a somber mood but Musubi was concerned for him, when they walking to his school Issei asked Y/n a question from last night as he said that Rias need to talk to him after school causing Issei to be confused and Y/n was glad that he was ok but Issei race him to the school.

While Y/n was walking to the school, he saw a bunch of people and saw the same twins from yesterday.

Y/n: (It's the same twins from yesterday.)

One of them said to him to offered something to drink as they take a seat and the same thing as Y/n.

??? 1: So, did something happen to your brother?

Y/n: He just got killed by a woman with black wings and looks similar to Yuuma amano I met yesterday.

??? 2: I'm sorry for hearing that. By the way, we've never told you our names. The one in the blue is Hikari, and I'm Hibiki, her twin sister.

Y/n: I didn't know that you two are twins.

Hikari: Trust me, Y/n. We maybe twins but have different personality. I may have a short temper but I rarely shows it anymore, but Hibiki on the other hand, has more a calmer expression.

Y/n: Sounds like exactly like me.

Hikari & Hibiki: You do?

Y/n: Yeah, actually. I rarely show a short temper but I have to remain calm to help my anger or anxiety.

Hibiki: But what about that Issei person?

Y/n: He's a massive pervert, Hibiki. So, here's advice from me, don't let him perv in on you or Hikari.

Hikari: We know how to deal with perverts. Use our lightning powers or kick him in the balls.

Y/n: Sounds like that hurts. But unlike my little brother, I highly respect female and their privacy.

Both the twins blush at him because he's not a perv and respect their privacy, so they're whispering about him and decided to both kisses him in the mouth and have wings appear from the twin's back and now, Y/n was now a ashikabi for hikari and Hibiki.

Hikari: Looks like we've stolen Musubi's thunder.

Y/n: Did you make a pun?

Hibiki: She did. Just roll with it. Anyways, since we've made you our ashikabi and you can use us in battle.

Y/n: Sort of like Fate anime?

Hikari: What? What's "Fate"? Like destiny?

Y/n: I'll explain it soon or later. Anyways, I've got to go to school.

He decided to run away from them as he was running to school after he gave them his location to his house.

(Timeskip brought to you by Hikari teasing Y/n with Akeno!)

After school, Y/n was walking back to his house and he wanted to ask Musubi or the lightning twins about what's the Ashikabi or what it does. As he was walking, the sky change colors and saw what's happening around with him as he saw a woman with long navel blue hair and see look at him.

Y/n: (Aw fuck!)

???:  You're Y/n Hyoudou, correct?

Y/n: Yeah. What's it to you?

???: I'm Kalawarner, and we need your help.

Y/n: What? Why? Are you a fallen angel?

Kalawarner: You're right about me being a fallen angel but I know you don't trust me or the other two of what happened with your little brother and I believe his name was Issei, yes?

Y/n: What about him? You haven't killed him did you?!

Kalawarner: No, I didn't. But I saw dohnaseek strike him with his light spear and kill him but the Gremory household saved him and made him retreat.

Y/n: You're talking about Rias. Looks like I was right to trust her. So why'd you come to me?

Kalawarner: Because Zack is forcing me, Mittelt and Raynare to kill people who has sacred gears including you.

Y/n: You're targeting me next then?!

Kalawarner: No, I'm not. I had to trick Zack that I have to kill a stray devil to find you.

Y/n: And what the hell am I gonna do free you and the others? It's not like.... Wait a minute!

He summoned his white and blue wings from his back, this made Kalawarner in awe by his own sacred gear.

Kalawarner: Divine Dividing.

Y/n: I'm sorry, what?

Then he heard the same voice from yesterday when Issei's death and made him shocked about it.

???: Perhaps I can explain.

Y/n: Ahhhh!!! The voice is back! I must be going insane!

???: You're not going insane, Y/n Hyoudou. I'm Albion, the white dragon of supremacy.

Y/n: A dragon?! Are you serious?!

Albion: Yes, I am. And Kalawarner is right, her and her friends are being forced and you have me to help you to free them, partner.

Y/n: Is he serious? But how am I doing to that?

Albion: Don't worry, Y/n. I shall help me to reach potential and protect everyone that you care about.

Kalawarner: He's right, you know. When you're strong enough, you may defeat every fallen angels and free us.

Y/n: Alright. But make sure you find me when I'm ready and I'll bring some backup.

Then Kalawarner decided to used her wings and flew away from him causing the sky turn back to normal and Y/n walked around to his house.

When he arrived back to his house, he was tried from today that just happened as he went upstairs to his bedroom and say Musubi was sleeping as he hopped on his bed with her while he's sleeping, Musubi faked her sleep as she kisses him while he's sleeping thus gaining her wings, after that she went back to sleep for real this time.

(Hope you guys enjoyed it! Looks like Y/n is their Ashikabi now, and Kalawarner needs his help. Stay tuned for the next chapter!)