siscon

plural siscons

1. JapaneseuncountablefictionStrong attachment or attraction to one's own sister.

   “Imouto sae Ireba Ii” - Adaptation of a light novel with a strong siscon slant.

   2017 September 19, Dave Baranyi, “Fall 2017 New Anime Try--Out List”, in rec.arts.anime.misc (Usenet)

   3 more examples

   What's up with Da Capo? Siscon and lolicon in episode 1, a catgirl later -- is the target market fetishists?

   2003 July 17, Galen Musbach, “The Summer of Our Discontent”, in rec.arts.anime.misc (Usenet)

   Heck, it's not too hard to find incest themes in non-H these days. Bro/Siscon relationships date back even before the seminal "Revolutionar [sic] Girl Utena", and still crop up in today's harem styled shows like "Sister Princess", and the still hilarious "Majikano".

   2006 March 26, Abraham Evangelista, “Re:Protecting the Children at anime cons”, in rec.arts.anime.misc (Usenet)

   Perhaps you're wondering about what '80s anime would have thought of the siscon aspect. It likely wouldn't have been permitted as such a central concept on an anime TV show […] but the siscon theme was the focus of a relatively popular 1980s OAV series named for its main character, Ami.

   2015 July 28, Tsukasa Fushimi, edited by Jemiah Jefferson, Oreimo: Kuroneko Volume 2, →ISBN, page 163

2. JapanesecountablefictionA person with such an attachment or attraction.