If you're looking for manga similar to Man of Many Faces, you might like these titles. All recommendations are made by Anime-Planet users like you!
Daisuke Niwa is an ordinary teenager who has a crush on his fellow classmate Risa Harada. But when Risa turns him down after he declares his love for her, Daisuke discovers the secret of the Niwa family: on their fourteenth birthday, Niwa males transform into the legendary Phantom Thief, Dark! Dark is set on stealing art and making mischief, but things become complicated when he falls for Risa's twin, Riku. As if that isn't bad enough, one of Daisuke's classmates, Satoshi Hiwatari, seems determined to capture Dark! Can Daisuke win Risa's heart, while hiding the secret of Dark and evading the police?
Both of these manga are very similar. The main characters are young boys who at night become famous thieves. They even both leave warning messages before they steal an object. They also both attend school with the person who is trying to catch the famous theif. D.N.Angel is much better, but if you liked one, I think you'd enjoy the other a bit as well.
Kaitou Kuroba is anything but a regular teenage boy; he’s highly intelligent and obsessed with magic tricks. One night after returning home from school he discovers that his late father, magician Touichi Kuroba, was actually the notorious thief, Kaitou Kid! With the sudden re-appearance of the phantom robber, Kaitou decides to don his father’s hat and cape to confront the impostor, but soon gets a taste for it himself. Now leading a double life, Kaitou attends school by day and steals precious jewels by night, but only if he can outwit the persistent Inspector Nakamori…
Okay so this recommendation is between two manga about a boy who is a thief in disguise and how be tries to hide it from the general public, so it doesn't want his life as a ciminal to get involved with his personal life. The story for both are quite similar. If you liked the tricks and things from either of these manga, if sure you'll like the other.