Kadokawa Store website has listed that an original anime of Boku no Kanojo ga Majimesugiru Sho-bitch na Ken will be included in the sixth limited edition volume of the manga, which will be released on March 26, 2018. It will include two stories: "Moshi Shinozaki to Akiho ga Sex Shinai to Derenai Heya ni Tojikomeraretara?" ("What If Shinozaki and Akiho are Trapped in a Room Where They Can't Get Out Unless They Have Sex?") and "Hateru Made Owaranai Ousama Game" ("A King Game that Won't End Until They Reach the Extreme"). The description mentions that the content will be more explicit than TV series.

Boku no Kanojo ga Majimesugiru Shojo Bitch na Ken has been serialized online in Niconico Seiga website since July 2015, and is also serialized in Comic Walker and Comic Newtype magazine. The series currently has five volumes in print, with the latest published on October 10. The anime series began airing on Thursday.

Source: Ota☆Suke