You were currently sitting in class as everyone in the room was either packing their things or already out the door, you were about to get up when you noticed a shadow loom over from beside you

You looked over to see none other than Rias, she was giving you a straight face as you did the exact same

Rias: Hello again Y/N.

Y/N: Hey Rias...

Rias: If it weren't too much trouble, could you do me a favor?

Y/N: Sure, what is it...?

Rias suddenly looked out the window for some reason and then looked back to you

Rias: Do you mind training my Servants?

Y/N: Train them? In terms of power?

Rias nodded as you sighed with slight annoyance, you then got up from your desk and packed your things before walking away

Y/N: Back of the school, 6pm...

With that Rias smiled and walked out of the classroom with you as everyone noticed the two of you walking out of the class together

Girl 1: No way...!

Guy 1: Of course he takes Rias...

Guy 2: Bastard...I'd like to teach him a lesson...

Girl 2: Shame...I was hoping to get his number...

You once again sighed as you walked out of the building and when nobody but devils were in the area, you jumped onto the roof and laid there until it was time

Time Skip

You were still laying on the roof as it was almost 6pm, you suddenly got up and leaped to the back of the school, landing on the ground on your two feet

Y/N: ...It's gonna be hard to train her weakling servants without breaking them...

Right on time, Rias suddenly called out to you from a distance as you turned around and saw her accompanied by her Peerage

Y/N: Of course they didn't forget...

Rias: I'm glad that you stuck around, everyone, Y/N here will be training your for the next couple of hours

Y/N: Just a few hours...that's gonna go by quickly...

You suddenly began to walk towards Rias and her peerage with your usual straight face, everyone began to warm up and stretch as you spoke up

Y/N: So here's what's going to go down...

Rias and her peerage paid close attention to you as your eyes suddenly glowed white for a second

Y/N: All of you are going to attack me, I want you to strike me with a clean blow and you have 30 minutes to do so, And I'll give you a handicap...I won't fight back...

Issei: You're overconfident dude, but whatever you say!

Y/N: Yeah...same goes to you...Your time starts...

Everyone got into their fighting stances as Kiba wielded his sword, Koneko got her fists ready to punch, Akeno flew into the air as Lightning began to surge from her hand, and Issei activated his Boosted Gear ready to throw down

Y/N: ...Now...

With that they all rushed towards you from different directions, the first to reach you was Kiba as he wielded his blade

Kiba readied his blade as he swung at you with a fierce slash which you of course dodged effortlessly

Kiba continued to swing as you continued to dodge before eventually leaping away and landing on your feet

BOOST

Koneko suddenly appeared behind you and reeled her fist back as you simply turned around and faced her, Koneko threw a punch that you caught and threw her away

Koneko landed of her feet and dashed towards you once again, deciding to attack you with a volley of punches that you dodged

You leaped away again and dashed towards Akeno as she fired a large bolt of lightning towards you, you simply smacked the bolt of lightning away and appeared behind her

She got more lightning attacks ready as she summoned a bunch of lightning bolts from above to strike you

You continued to dodge effortlessly as you eventually slipped past them and rushed towards Issei

BOOST

Y/N: So you inherited the boosted gear...interesting...

Issei, regardless of not yet being ready to fight, reeled his fist back and shot it forward as you dodged the punch and maneuvered behind him and spoke up

Y/N: It's been quite sometime...Ddraig...

Ddraig: Yes, it has...

Issei: Woah! You can talk?!

Y/N: Yes he can, I was the one who turned him into a sacred gear...so I guess you have me to thank for your powers...

BOOST

Issei swung at you again as you dodged with ease and leaped away

Y/N: You are all very inexperienced, Kiba and Koneko, you rely too much on offensive attacks, Akeno, you rely too much on ranged attacks, Issei, you don't really know anything...anyway...let's get back to it...

With that they all rushed towards you at once as you got ready for a bunch of dodging

30 Minutes Later

Rias and Asia were in complete shock as Akeno, Koneko, Kiba, and Issei were all on the ground exhausted as you stood tall without even breaking a sweat

Y/N: After is training session, I have one thing to say...

Everyone looked at you as you spoke up

Y/N: You're all very weak...

Issei went wide eyed and growled before he got up and rushed towards you, you simply looked towards him as he threw a punch that you blocked instead of dodging

Y/N: Your training session is over...

Issei: This isn't training!! I'm gonna—

Y/N: I said it's over!

Issei was about to go in for another attack when you suddenly maneuvered behind him and kicked him sending him flying away

Rias: Issei!!

Issei went crashing through a bunch of trees as you began to walk home

Y/N: Rias, I'm letting your pawn off with a warning, the next time he does this I'll do more than just kick him...

With that you warped home leaving everyone dumbfounded, you appeared in front of your bedroom door as your guards instantly greeted you

Guards: Greetings Sire, how was your day?

Y/N: It was going surprisingly well until a brown haired buffoon annoyed me...I'm going to hang in my room for the night, you're relived for the evening...