"Do or Not" (stylized as DO or NOT) is a song recorded by South Korean boy group Pentagon, released on March 15, 2021, by Cube Entertainment as the second track and lead single of the group's eleventh extended play, Love or Take written and produced by members Hui and Wooseok, alongside Nathan.

[4] "Do or Not" has a genre of pop rock that shows Pentagon's own unique musical and narrative style where 8 members become main characters of a romantic comic.

The lyrics "Say you like it or not', 'Just make up your mind now' illustrate one's cautious inner side and genuine feelings of being desperate while waiting for other person's answer, but at the same time looking witty and nonchalant.

With the male lead of a TV show as the motif, 'Do or Not' portrays a chill attitude with phrases like just be with me or not', expressing Pentagon's very own simple and straightforward, 'just do it or not' kind of love in this complex and challenging society.Puah Ziwei of NME praised that the group's "sub-vocalists Shinwon, Yeo One and Yanan for stepping up" and "be satisfactory singers in their own right" as the group's "vocal powerhouses" Jinho and Hui were absent.

Emlyn Travis from BuzzFeed noted that the music video "not only the perfect fit for the song's upbeat melody and cheeky lyrics, but it also features the group's leader Hui who recently enlisted in the military last month, so it's especially sweet for fans.