Hey, this is something I am trying out. Giving pitches of Stories that I have in mind but I don't want to create it. This is the first one.
The idea is of Spider Man being a part of the DxD world and dealing with the supernatural and also having some girls clinging into him, showing some nice amount of fan service.
Yeah, we have American names in Japan so deal with. Kuoh would be a really big city, with skyscraper all over so Spider could swing on it.
On the first year Peter Parker a studying at Kuoh Academy he and his class to a trip to a science lab where he was bitten by a spider. After that Peter became the one true spider man, fighting crime and dealing with his life as a high schooler and having a good time with his best friend Issei Hhyodou.
For the past year Peter has been Spider Man in Kuoh, dealing with the usual stuff of Spider Man and having a double life as a student of Kuoh Academy. During this entire year he has never been in contact with a supernatural creature, but the Supernatural world became aware of him and he has a large fanbase, specially with kids. Ever since his uncle death Peter has been volunteering in F.E.A.S.T and becoming good friends with its owner Martin Li, Issei also goes and tries to do some good.
During this year he fought most of his villains, from the Green Goblin from Mister Negative. Even had his first encounter with Venom, for a period Issei called Peter having a emo phase. Rias doesn't know how to deal with these people since they are still regular people that could affect the Supernatural world, which is why she is fond of Spider Man since he is the right hero for the common people of Kuoh.
When Issei is attack by Raynare that's when Peter come by after fighting the Rhino and he sees his friend bloody body, before he could do anything it disappeared, and he becomes desperate. He hesitates of going to Issei parents house and decided to do it tomorrow, but Issei arrived in his house like nothing has ever happened.
From there Spider Man learns about the existence of the supernatural world, from listening to conversation while being hidden and from books. When the rescuing of Asia happens he arrived to save her, in amidst the battle Spidey convinced Rias to spare Raynare as he webs her up to someone claim which is what happened.
From there Spider Man and the ORC become a team up, the devils still having no idea who is beyond the mask. Peter sees that Rias and Asia are bonding more with Issei so he has a nice chats with Akeno, Koneko and Kiba.
When the Riser incident happened Szierche comes to Peter for his help, telling that he knows why he does this and he beyond move that some could be so brave and yet so young, he was even considering adding him to his peerage but had a feeling that Peter would say no. After their talk he requested that Peter would help his sister and their peerage on the battle with Raiser which he does. Once the battle is finished the team meet up with the elder devil and Peter removed his mask, reviling to his friends who he truly is.
In the season 2 Peter and the ORC become closer, they go to Aunt May and help him fight crime while using mask. Peter noticed how Akeno likes to make the criminals cry in pain and see her as sadistic lover to which the black-haired girl agrees. During their adventures Electro and Akeno fight and they ended up forming a hatred for each other, Electro at one point was able to surpass her and was going to kill her but Spider Man saved her which ended up with Akeno developing feelings for him. In another story Kraven appeared and fights Koneko who he bested thanks to his knowledge on mystical creature, and he was able to kill Nekomatas in the past, in fact he killed Koneko parents which was the reason why her and Kurokoa ended up meeting their master. Spider save her and Koneko also ends up developing feelings for him.
When Excalibur Arc happen Peter and Irina meet up, he knew she was a girl the entire time but never told Issei as a funny prank. At first, he really dislike Xenovia due to her prestige against devil, he even managed to make her lose balance during their fight. When the battle with Kokabiel happen Peter webs up the Fallen Angel wings so Issei can deliver a powerful attack defeating him, very simple.
Once this stuff is settle a new threat arrived, Venom. Eddie Brock return and this time having more knowledge on the Supernatural world. While Peter is at Akeno house listening to her story Eddie is there, before she can put the moves on him Venom appear and they fight. During their brawl the symbiote feels Akeno feelings and jumps into her, making a venom Fallen Angel/Devil Hybird which defeats Spider Man in a second, plus with Akeno sadistic feelings and you got an unstoppable monster. Once the ORC and Spider Man fight against this creature, they are able to save Akeno, in the end she kisses Peter and proclaim that she loves him.
Then the conference happens and the leader of each faction praise Spider Man for his devotion for fighting crime and keeping peace. Peter feels with his spider senses the confusion and fights the magician with the others, he motivates Issei at the right time to helep beat Vali. The day is saved Rias and Issei kiss and Peter makes sure Koneko is ok after the attack.
In the season 3 we would first go to the Underworld, meeting Rias Parents and dealing with Loki. After that Akeno wants to go on a date with Peter, however before their date he fights Doctor Octopus who manages to steal his body leaving him decaying in a dying one. In their date Akeno notices something wrong, before a kiss she attacks Peter and he reveals to be Octopus. Once discovered he runs away, the ORC finds the real peter dying and Rias doesn't want to just give him a devil piece, they are going to attack Dr Octopus. When they find him they are defeated, Otto stated that he studied how each one of them fight, their weakness and the new suit is made of holy metal which gives him an advantage while fight these creatures. Peter dies but Otto vows to become a superior Spider Man and if the ORC tries to interfere he will expose them.
After a little saga Peter get his body back and he and the ORC try to fix the damage done by Otto. Newcomer Rosseweisse is horrified that this what a group of teenagers have to go through every month. Once things are clear Akeno, Koneko and Xenovia are glad that Peter is back to his old body and its him again.
In Season 4 after the whole event at School Peter and the ORC are going to face their most challenging villain yet, Morlum. They meet Ezekiel a man with ties with the spider goddess Arachne stating she has been paying attention to Peter ever since he was bitten and wants him to be in other words her pawn, Peter denies but Rias promise to keep in touches with Ezekiel. When Morlum arrives it's not an easy fight, every one of the ORC is beaten to a pulp, Issei get his armor broken and almost die, Peter had to struggle to defeat Morlum but the vampire is defeated I n the end, but the ORC is beaten to the brink of death.
Aunt May would eventually find out and meet up at the Gremory Mansion where she talks with everyone and accepts the true. Also, she is happy that Peter found multiple girls that loved him.
It would go on like this and facing off the Spider Man villains until we reach the final threat, Knull. The Factions leader discover that Knull has returned, and his presence threaten all of existence since he is the one that killed God. Peter will have to get his hands on various mystical objects and his old costume if he wants to fight against a being this powerful.
Characters like Sona Peerage, Azazel, Szierche, Michael, Vali, Cao Cao and so many others would have various opinions on Spider Man. Peter would try his best to make sure innocent people are save no matter what.
Yes, I would have to sacrifice MJ, Gwen and Felicia. I see a lot of crossovers where they aren't so this would have to be like this. Peter is already getting Harem girl so its only common to some to go.
His villains would be acknowledged of the Supernatural world, with Norman Osborn being called one of the biggest menaces and taking control of various areas, Szierche even calling him a mad man who has no fear.
Here are the harem list
Peter Parker: Akeno, Koneko, Xenovia, Ravel, Roseweisse, Sona, Seekvaria, Jeanne, Gabreil.
Issei Hhyodou: Rias, Asia, Irina, Le Fey, Elmehilde, Kurokoa, Aika, Kiyome, Tsubasa, Ingvild.
This is the pitch, if a lot of people get interested, I might write something like this in the future and erase this page. I hope you all enjoyed, thanks!