A common characteristic is extreme protectiveness. They see the heroine as 'theirs' and will go to great lengths to keep her safe, even if it means being overbearing. For example, they might not let her go out alone at night.
One popular 'psycho possessive hero romance novel' is 'Twisted Love' by Ana Huang. The male lead has a very possessive and somewhat 'psycho' - in a passionate way - nature towards the female lead, and their relationship is filled with intense romance.
A lesser - known but great possessive hero romance novel is 'The Duke and I' by Julia Quinn. Simon, the Duke, is possessive in his relationship with Daphne. His feelings for her drive the plot forward and their love story is full of historical charm and romantic tension.
One reason is the sense of security. A possessive hero gives the impression that he will go to great lengths to protect the heroine. It makes the reader feel that the female character is in safe hands.
One popular one is 'Fifty Shades of Grey'. The male lead, Christian Grey, is a possessive hero in the story. His relationship with Anastasia Steele is filled with his strong desires to possess and protect her, which is a common trope in possessive hero romance novels.
These heroes usually have a strong sense of ownership. They consider the heroine as their own in a way. They might be controlling at times, but it's mostly out of their deep love and fear of losing the one they love. In some novels, this can lead to conflicts in the relationship which need to be resolved for their love to grow.
For beginners, 'The Hating Game' is a good choice. The male lead, Josh, has a possessive side when it comes to his relationship with Lucy. It has a light - hearted and fun tone that makes it easy to get into the possessive hero romance genre.
One popular one is 'Fifty Shades of Grey'. The male lead Christian Grey is quite possessive and jealous in his relationship with Anastasia Steele. He has a complex personality which adds a lot of tension and passion to their romance.
One idea could be a crossover where Mob and Midoriya meet. Mob's psychic powers and Midoriya's One For All could lead to some really interesting team - up scenarios. Maybe they have to face a villain who can manipulate emotions and they combine their powers to defeat the villain.
Well, in possessive hero novels, usually the hero is extremely protective which is related to his possessiveness. He might go to great lengths to keep the female lead safe, almost like she is his most precious possession. The settings of these novels often play into this as well. For instance, if it's a historical setting, the hero may use his social status or power to keep the heroine within his sphere of influence.