Reki Kawahara has since moved away from writing adult content, focusing on the expansive world-building of the Alicization and Progressive arcs. However, he has never fully disowned the chapter, acknowledging it as part of his early development as a writer.
The chapter takes place between Chapter 16 and Chapter 17 of the original web novel, immediately after Kirito and Asuna get married in the virtual world of Aincrad. Sword Art Online Chapter 16.5 Full Color WORK