Well, without having read the specific novel, it could be about a hero who has gone through many battles and adventures. Tired of the chaos and danger, he decides to retreat from the limelight and find a quiet place to live. Maybe he has to face some challenges from his past enemies who don't want to let him go in peace, or perhaps he struggles to adapt to a normal life after being in the heroic role for so long.
Well, the former hero is the central character. There may be a group of people in the village or town where he decides to live peacefully. One of them could be a nosy neighbor who is always curious about his past. And perhaps there is a local leader who at first is suspicious of the new arrival but later becomes an important figure in the hero's new life, either as an ally or an obstacle depending on how the story unfolds.
The plot could involve the hero's fall from grace for some reason, like being betrayed or making a big mistake. Then, they find a new purpose in taming monsters. Maybe they use their old heroic skills in a different way to befriend and control the monsters.
It could be the former hero's old rival who doesn't like the idea of the hero changing their role. This rival might see the hero's new path as a threat to their own status.
One idea could be that Harry discovers a hidden part of the wizarding world where there are 'monster girls'. Maybe he stumbles upon a secret club at Hogwarts. Through his interactions with them, he learns about their unique cultures and magic. This could lead to him wanting to be more involved with their world, perhaps even using his skills to help them with problems they face.
Typically, they often feature a main character who was once a hero or had heroic qualities in a past life or situation. For example, they might have lost their status for some reason and are now on a journey to regain it or find a new purpose.
I think it's worth reading. The plot is full of twists and turns. It takes the classic hero - comes - back concept and adds unique elements to it. The character development is well - done, and the world - building is immersive. You'll find yourself getting drawn into the story quickly and rooting for the former hero throughout his journey.