This is a mix of Spider man x Deadpool and Miraculous Ladybug Plot.
Izuku Midoriya, quiet dork who loves school and hanging with his friends at the UA campus. There's one thing he loves more than all of it and it's his secret undercover work as Spiderman. One thing he promises to do is to keep his identity a secret because he doesn't want his friends to know what he does on the sidelines, he knows they would worry or expose him to the public. He's trained for years at martial arts and is very good at part-core so the flexibility he has to have he is able to accomplish perfectly. And because of his heroic abilities, he managed to find someone just like him, only he has a special ability that no one else had: regeneration.
Anytime something happens that effect his body, it regenerates itself. Cut a finger off? Grows back. Got shot? Seals itself up. He could cut his d!ck off and it would grow back within a day or two. What's even better? He's in love with Spider-Man
Katsuki Bakugo has always been a hard ass growing up. Rude, entitled, and acts like a prick to everyone, including his friends. Those close to him know and understand that that's just the way he is, while strangers hate him or find him very rude. He's constantly picking on some of his classmates, especially Midoriya, who he nicknames Deku when they were kids. It's a love/hate relationship with those two, but none the less Deku has his eyes only on Bakugo. There's just something about him that he fell for when they were children that he just can't shake.
As they save Japan together, feelings will get thrashed around as well as relationships. The question is-what's the end game here?
(Fair warning there will be smut, cursing, abuse, torture, violence, blood (a lot of it), and plenty of other bs that I'll put warnings at the begging of the chapters)