Sex: Prologue
Genres: Action, Drama
Type: OVA, Episodes: 1
Aired: May 7, 2018
Studio: MAPPA
Source: Manga
Rating: PG-13 - Teens 13 or older
Synopsis:
The anime depicts an original story before Kaho arrives, when Yuki and Natsu have just met in Okinawa.

(Source: ANN)