Shin has a sister. They're both reincarnations who died young, reborn in a world of swords and magic. Adopted by the Wise Man, Merlin, they've spent the past 15 years learning nothing but magic. Overpowered and clueless, they're about to be unleashed on an unsuspecting wolrd.
Shin Wolford was walking in the forest with his grandpa Merlin until he gained the power of Dragon Slayer Magic, a power that has not been seen in over two hundred years. 5 years later, Shin is going to attend the Magic Academy to show how strong he is compare to others and may meet others with similar type of magic like him and getting a harem too as he will face danger head on.
After a long time being on the top of his career in MMA fighting, the unexpected happened. However, things instantly changed from that point onwards. My second take on Kenja no Mago (Partially following a request)
Izuku Midoriya always wanted to become a hero, but he never expected to be trained by the most powerful hero from another world. this will be interesting.