This is my first story so I will be bad, sorry anyways on the story

this takes place after Irina leaves to Europe also issei x harem

"man I can't believe Irina is gone who I'm going to play with now" said a boy in sad tone this boy has brown hair with some spikes and a bang on the back of his hair and had brown eyes his name was issei hyoudou and right now was at the park.

then all a sudden a stranger comes to issei and speaks "what is a young kid like you out here with no one around ?" the stranger was tall almost as tall as sirzechs "uh I'm just lonely mister, my friend recently moved to Europe and I don't know anyone else" issei said in a sad tone still

"well sorry but you are a interesting little one so you have come with me" says the stranger as he knocks out issei (also issei is 6 years old at the moment) then the stranger puts issei in a black van and then drives off to a unknown location

AT THE UNKNOWN LOCATION

the black van stops at a abandoned warehouse outside the kouh (I think that how you spell it) the stranger get out the van and had gone to get issei from the van (issei was in the back of the van) and brings the still unconscious issei to a white room and places issei on the ground and leaves the room. minutes later issei wakes up "yawns uh w--w--where I'm?" issei said in a scared voice then the speakers in the room had a voice issei knew "well hello 002 nice to that you are awake after I knocked you out" said the stranger from the speakers "w--w--who are you?" Issei said still with a sacred voice and face expression " right I need to introduce myself my name is Alex Jones and your in the middle of nowhere" said Alex as he was trying to make sure issei wouldn't think of escaping "w--w--what why is there something you want for me I can give it to you just let me leave" issei said still scared ,Alex then just sighed as he just wanted the project to start "sorry kid I can't make you leave already in you to do something for me and let 'help' you" Alex said that with sacasim then he got a call from someone "hello boss I'm allowed to experiment on the boy now then the person said yes will with one should I start with then the person said something,will I will get started then Alex then ended the call alright let's do this" Alex said with a sigh as he said that with a syringe with s black liquid with a red glow (it's a devil syringe) and Alex opens issei door room "alright 002 come here" said Alex then Issei went over to Alex " HI Alex what's that in your hand " Issei said with a curious look on his face as well pointing at the syringe "nothing to worry" Alex says as then he holds Issei's arm puts the syringe into Issei's arm " ARGHH this hurts" issei says as he is in pain then horns,a tail, and demon wings (imagine black clover demon wings) Alex them smiles "it seems that it work he was right you are a interesting one" as Alex pulls out a mirror for issei to look at the new features issei then thought that he looked like a freak and speechless then Alex leaves the room

TIMESKIP 9 YEARS LATER

Cliffhanger, sorry will next time we will see all the issei gained while at the laboratory and him become apart of the pervert trio well see you next time and also we might see issei early then cannon