I don't own Mondaiji Tachi Ga Isekai Kara Kuru Sou Desu Yo? or Testament of A Sister New Devil. They belong respectively to Tatsunoko Taro and Uesu Tetsuto.
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We ca see a blond teen calmly walking up on a hill road. He can't be older than 17, with a lean but yet strong body. His attire consists of a a dark blue school uniform with a yellow shirt under it. He also wears a pair of headphones that are comfortably placed on his head. At the moment, the teen had an annoyed expression on his handsome face.
'' What a boring day.'', Sakamaki Izayoi muttered.
Earlier when he saw those punks bullying a younger student, he thought that at least he could have some type of entertainment with them, no matter how small it would be. The panicked faces of the punks was pretty funny, but it was just a fake enjoyment to the blond. Even so, he kept throwing the rocks that looked more like grenades, causing explosions that had enough force to destroy a small house. Now, he did this type of things because he was bored and not to save the boy that was getting his ass handed by the older teens. The stronger will always prey on the weak so, if the boy didn't want to suffer anymore, then he really needed to learn how to stand up by himself or learn how to fight.
He sincerely missed the old days when he traveled around the world with Canaria. Even if the myths that they investigated were nothing but lies or a pure fantasy, staying with such a strong and intelligent woman like her was fun. Although he would never admit it, Canaria was like a mother to him, and even if he didn't show it in front of Homura and Suzuka, her death affected him to a great deal.
Shaking his head to get ride of such thoughts, Izayoi glanced at the night sky.
'' Isn't there anything remotely interesting in this world?''
He was brought back to reality by a strange sound.
''Huh?''
He heard it again and it looked quite similar to a small explosion. Looking in the direction of the forest besides the hill, the blond saw dust and sparks flying everywhere, followed by destroyed tree's,a strange green light and muffled voices.
'' Some type of fight?''
Izayoi quickly put strenght on his legs and jumped towards the forest. His heart was beating faster and adrenaline cursed through his body at the prospect of a good fight. He wasn't a idiot, it was clear that the people that were in the forest weren't normal humans.
He could hear the voices better now, so he was in the right direction. Increasing the pace, the teen finally arrived at the local. There, he saw three girls. One of them had scarlet hair and was using a normal school uniform, the other two thought were weird, the white haired chibi girl was using something that reminded him of clothes that you would find in a S&M club while the girl with light blue hair was using something akin to an armor. Following their gaze, he saw a brown haired teen with some type of sword in hands, he was fighting against a masked man that had spike hair.
'' It seems that they didnt notice me yet.''
Izayoi then had a nice idea. Picking up a rock from the ground, he screamed.
''OI!''
At this, everyone turned their attention to the newcomer.
''Who are you?'', Lars asked.
''A student? Damn it! Mio, Yuki, Maria, take him to a safer place and erase his memory!.'', Basara spoke hurriedly.
''Got it Basara.'', The three girls said at the same time.
Izayoi ignored their talk and stared at the masked man, who clearly was the strongest between these people.
'' Let me join on the fun too!''
Screaming with excitement, Izayoi threw the rock in Lars direction. It flew at the stunning speed of the third cosmic velocity and hit the masked man right on his stomach, sending him flying. Not wasting his chance, Izayoi instantly appeared in front of Lars, who didn't had recovered yet, and began to give multiple punches on the man's face.
''Hahaha! Ora Ora Ora Ora ORA!''
Giving one last punch, the blond grabbed his face and threw him on the tree's, the impact of Lars body made a layer of dust cover the place.
''Oi get up, the fun is just starting!'', Izayoi exclaimed while walking slowly to Lars direction.
When the dust cleared, He saw that the man wasn't there anymore. Sighing in disappointment, He turned towards the small group of four people that were staring at him with their jaws dropped.
Nobody spoke a single word. After a minute of tense silence, Izayoi lifted his right hand.
''Yo.'' He said casually, wich earned a sweat drop from the group.
''Who the heck are you?'', The red haired girl, Mio he recalled, asked.
''Me? Just a normal student that was passing by...''
''There's no way that a normal student would defeat a demon so easily!'', She shouted with irritation. Was this guy trying to make a fool of her?
''So that guy was a demon? Interesting...''
''Answer me!''
''Mio, stop.''
''But Basara-'', The brown haired boy lifted one hand, stopping her. Looking at Izayoi, Basara smiled.
''Thank you for the help, but we can't ignore what we saw you do, if you don't mind could we talk about it later?''
Izayoi shrugged.
''I don't mind and I do have my own questions too.'',Basara nodded.
The purple eyed teen noticed something weird, a movement in the shadows. Seeing a tall and muscled man emerge from the ground behind Basara, his eyes widened.
''Watch out!'', Izayoi screamed.
Before he could move, the mysterious man stabbed Basara's back.
''BASARA!'', The armored girl shouted with panick on her voice.
Mio just stared with a blank face as Basara fell to the ground, her eyes filling with tears while red energy began to surge from her body, covering it.
''Nooooooooo!''
With her scream, the energy was released, vaporizing the demonic man and sending everyone, except Izayoi, flying for a few meters.
''That's quite the amount of power.'' He mused as he watched the ground and the tree's being destroyed by Mio's redish energy.
Mio then began to float in mid air.
''What's happening?'', Basara asked while standing up with great difficult. Izayoi was a little surprised by the durability the guy seemed to possess.
''B-Basara...!''
''Mio!''
''I can barely control this power, if this continues then I'll-'',She began, but the brown haired teen interrupted her.
''Don't give up!''
''Please Basara, Kill me, do it before I destroy this world!.''
He gazed at her for some seconds.
''I refuse.'', He told her firmly.
''Y-You idiot!''
''You're my little sister, so I'll definitly take you back home.''
At his words, the tears begun to descend by the scarlet haired girl's cheeks.
''Please save me... onii-chan.'',She whispered.
Basara materialised his sword, ready to use vanishing shift despite the injuries that he had but...
''Wait a moment.'',The voice of the blond guy stopped him.
Basara silently glanced at Izayoi, as if silently telling him to say what he wanted.
''We just need to stop the energy right? Then let me do it.''
''What?'', Basara was a little shocked by his words.
''You're in a bad state, so I'll save her for you.''
Izayoi's proclamation astonished the green eyed teen, but when he saw the determination inside Izayoi's eyes, he sighed and gave a small grin.
''Okay, if you have a way to save her, then I'll leave it to you.''
Smirking at Basara, Izayoi walked towards Mio. He clenched his fist and gave a weak punch in the girl's stomach. The effect was instantenous, the energy dispersed and the girl fell, easily being caught by Izayoi before she hit the ground. He looked at her face and saw that she was sleeping.
''You really did it.'' Basara's voice reached his ears.
''Yeah, we should go to a safer place, You need to threat those wounds, they look terrible.'', Looking at Yuki and Maria, He growled,'' Hey! stop spacing out and help the guy, he is barely standing.''
The girls quickly did as told, the both of them holding Basara by his shoulders. The white haired loli turned towards him.
''We can go to Basara-san's house, follow us uhmm...''
''Sakamaki Izayoi.''
''Then Izayoi-san, please come with us.''
Nodding, the blond began to walk besides them, thinking that from now on, things would get a lot more interesting.
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AN: Hello guys I'm bringing to all of you a Mondaiji/Sister new devil crossover! As you can see, Izayoi won't go to Little Garden(at least not for now), and before anyone asks me, yes there will be pairings, it will be:
Izayoi x Mini harem, the girls will be Yuki, Older Kurumi and Zest(maybe Kuro Usagi and Shirayuki if I decide to make Izayoi and the sister new devil gang go to Little Garden)
Basara Mini Harem, girls are Mio, Chisato and Maria( maybe Asuka later)
To those that read my other stories, This week I'll update my Bleach/Rakudai no kishi story and on the next one it'll be the turn of my Bleach/Fate Grand Order crossover to be updated, I didn't update them earlier because I lost my muse for some time but now it's back at full force! lol
This first chapter was small because it's mostly a test to see the reception but don't expect the next ones to be big, they will generally have 2,000 words.
I also would like to know if someone would be willing to beta read this story since english is not my first language and I'm sure that having a beta would make this story waaay better.
That's it for now guys(and girls?), Leave a review saying your opinion, I accept everything, even harsh criticism, you can send flames too but they'll just be ignored :D