The Admiral of Hogwarts

For Hugo, after traveling to the world of Harry Potter's previous life novel, he will face a new identity, new knowledge and a magical world where war is likely to break out. What's worse is that his identity makes him doomed to be unable to escape from all this. Fortunately, he knows the plot and knows what to do in the future. Even better, he finds that he has obtained a golden finger from an ancient ship girl game on his previous life's mobile phone, which can not only strengthen himself, but also summon those ship girls to his own.