It doesn't have to be to the point where hes going around in disguise like Bridal Mask, Healer or City Hunter, it can also be something similar to Innocent Man, Monster, Shark or Bad Guy. Lastly stories where people take over another persons identity like Rooftop Prince or Please Come Back, Mister. I made a similar post in the past but tweaked it to make it more understandable and with different criteria.
