My Vigilante Hero Life! (Omnitrix Male OC x My Hero Academia)

Kieran Castiel, a simple boy who was deemed Quirkless and was able to get into one of the best Academies in the world, on an artificial island mostly referred to as I-Island. Originally his life was mostly going towards a goal of creating Support Items for future Heroes in the making, only to get invited on a Summer Vacation by his childhood friend Melissa Shield along for the ride, alongside David Shield who wanted to take a break from whatever has been bugging him as of late.

However, this particular decision changed his life forever as he ends up receiving a powerful watch made from alien technology, known as the Omnitrix. A unique watch that binds the DNA of the aliens and his own, allowing him to transform into ten different aliens, having unique qualities and advantages. This would end up introducing him to a different perspective that he would've never expected as he takes up a Vigilante role, under the guidance of David Shield and the help from Melissa Shield, he would strive to become one of the greatest Heroes in the world, with or without a professional license!

A/N: "Note that I do not own anything from the Ben 10 franchise, nor do I own anything from My Hero Academia. This is pretty much my own take on a what if scenario, as I am going to make a couple of changes and figure out a way to integrate the two Universes into one. So I hope you enjoy!"