its where Naruto transforms himself into a naked girl. so basically Naruto just turns into a girl to get into places only a girl can go au he uses it to distract enemy guys. hope my answer helps wewe =]
"Oiroke no Jutsu" au Sexy Jutsu is a technique used to distract your enemy with sex appeal. Usually it's turning into a naked woman, but there have been variations like "Oiroke no Jutsu: Onna no ko doushi" (Girl companions) and "Oiroke no Jutsu: Otoko no ko doushi" (boy companions, a personal inayopendelewa of mine.)