The episodes of the original net animation (ONA) The Melancholy of Haruhi-chan Suzumiya were produced by Kyoto Animation and released on YouTube between February and May 2009.
During the first four episodes, the characters in the series were rendered using computer-generated imagery.
The series was released in North America by Bandai Entertainment in 2011, and was relicensed by Funimation in 2014.
There are two pieces of theme music used for the show.
The opening theme song is "Ima Made no Arasuji" (いままでのあらすじ, "A Summary of the Story Up to Now") while the ending theme is "Atogaki no Yō na Mono" (あとがきのようなもの, "Something Like an Afterword"), both performed by Aya Hirano, Minori Chihara, Yuko Goto, Tomokazu Sugita and Daisuke Ono.