I recommend Hogwarts: From the Squib to the Highest. The male protagonist was a new soul born in the world of Harry Potter. He had a mysterious system that recorded skills and equipment. He could use supernatural methods, magic, witchcraft, and swordsmanship to travel through the worlds of Harry Potter, Tanya, and Howl's Moving Castle. Although the female lead was not Hermione, this novel was very well written. The plot was tight, and more importantly, it was already finished. I hope you like my recommendation. Muah ~