It's definitely gained a significant fan base. The interesting characters and engaging plot have contributed to its popularity. Also, the way it combines romance and mystery elements appeals to a wide audience.
The main characteristics include intense chase scenes, a sense of helplessness for the victim, and a build-up of tension as the stalker gets closer. It might also have elements of mystery as to the stalker's identity and background.
Well, 'A Killer Paradox' manga is full of mystery and unexpected twists. The story keeps you on the edge of your seat. The characters have depth and their development is fascinating.