What? I got reincarnated in Masamune-kun's Revenge?! [HIATUS]

It's a crossover world with the Quintessential Quintuplets and some martial arts moments. Don't read this if you don't like such stuff. --- A young boy was walking happily across the road before getting hit by a truck. BANG! Well, what happened after was quite confusing. He got reincarnated into the world of Masamune-kun's Revenge. Except... "Huh? What is Miku doing here?!"