Kyūkyoku!! Hentai Kamen

Ultimate!! Pervert Mask (究極!!変態仮面) is a comedy manga series originally run in the shōnen anthology magazine Weekly Shōnen Jump between 1992 and 1993 created by Keishuu Ando. Running for 52 chapters, it tells the tale of a young martial artist who transforms into a bizarre hero of justice by wearing a pair of panties on his head. The series returned by way of School Rumble author Jin Kobayashi with the special one-shot Kaettekita Hentai Kamen (帰ってきた変態仮面) in the magazine Jump Square in 2008.

Story
Kyosuke Shikijō is a high school student skilled in kenpo but slightly incompetent with girls, to the point that his interaction with them makes him get into painful situations. One day, he saves a girl named Aiko Himeno from bullies, whom he's immediately smitten with. When she is taken hostage as part of a bank robbery by a group of criminals, Kyosuke is forced to take a disguise in order to save her without being recognized by the crooks. (after an earlier incident where he reveals himself on a megaphone) But when he accidentally puts a pair of panties over his head instead of a normal mask, he undergoes a transformation: due to the perverted genetics of his mother (an S&M worker), he is able to awaken the full 100% latent potential of his body! Running out with nothing but the panties and a pair of underwear on a near nude body, Kyosuke, now christening his masked self as Hentai Kamen, uses his power and perversion to defeat the criminals and save Aiko. However, his troubles have only begun....

究極!!変態仮面 瘋狂假面