On September 9th, 2021, artist sibi2028 tweeted a two-panel version of the boob shadow (meme) (post #6141939). In the following days, multiple users on Twitter used the drawing as a meme template, creating redraw versions in which they shipped various characters.
Tag this on boob shadow (meme) posts which specifically reference the format of the template, including the posing and angles of the two characters present.