The sequel is called HK: Hentai Kamen The Abnormal Crisis. According to the movie’s tagline, panties across the word are vanishing. So, it’s up to Hentai Kamen, the pervy superhero who wears women’s underwear on his face, to save the day, the panties, whatever.
http://kotaku.com/japans-perverted-supe ... ce=taboola