There are young women that  work for the country for the objective of satiating the sexual desire of students, in an effort to prevent possible sexual crimes, particularly in educational institutions. 

The reasons for  young women to take on such a "career" are various, however there are common features: They don't use clothes, they are always naked and they are called by number, their name is unknown to anyone...

 Kimi no na wo yobe ba  Vol.  1     CENSORED/ENGLISH SUBTITLED

 Kimi no na wo yobe ba  Vol.  2      CENSORED/ENGLISH SUBTITLED