Written and illustrated by Atsushi Kamijo, Sex was serialized in Shogakukan's seinen manga magazine Weekly Young Sunday from 1988 to 1992.[1] Shogakukan initially collected its chapters in two wideban volumes, under the Young Sunday Comics Special imprint, on November 13, 1989, and August 5, 1993;[2] however, the publication of the third volume onwards was halted due to the author's own decision.[3] Over ten years later, Shogakukan republished the series in seven tankōbon volumes from November 5, 2004, to May 2, 2005.[4] Shogakukan re-released the series in five bunkoban volumes from August 10[5] to December 15, 2012;[6] To commemorate the 30th anniversary of the series, Shogakukan released a 4-volume edition, Sex 30th AnniversaryEdition;[7][8] they were released from March 25[9] to August 31, 2017.[10] A promotional video, animated by MAPPA and directed by Sayo Yamamoto, titled Sex ~Prologue~, was launched as a home video exclusive to customers who purchase all four volumes in March 2018.[11][12]