[#]

[#] (read as "hash") is the second extended play by South Korean girl group Loona. It was released on February 5, 2020, by Blockberry Creative and distributed by Kakao M.

== Background == On March 31, 2019, a teaser titled "#" was released on the group's official YouTube channel. The clip looks back to Loona's previous releases and teaser films and ends with the word "burn". It also features imagery of butterflies, as well as the symbols "++" and "xx". On May 31, a second teaser was released titled "La Maison Loona", with the phrase "delayed but someday" showed at the end. On December 13, a teaser titled "#1" was released. On December 31, an image teaser was released.