Well, it's hard to say exactly without knowing more details. But it could potentially focus on Peter's adventures or his struggle against some sort of evil. There could be elements of mystery and drama to keep readers engaged.
I'm not sure specifically as there could be many novels with this title or related concept. It might be about different ways people show affection in a fictional story, perhaps romantic love, friendship love or family love shown through the characters' actions and relationships.
Well, 'A Sign of Affection' manga is popular because it combines romance and drama in a way that's both heartwarming and exciting. The way the story unfolds is captivating and the illustrations are amazing.