NATURE World: Code A (stylized in all caps) is the second mini album by NATURE. It was released on November 12, 2019 with "Oopsie (My Bad)" serving as the album's title track.
It is their first release with Sohee after she joined the group in October 2019 while Aurora did not take part in their comeback due her participation on the upcoming season of the Chinese survival show Idol Producer.
The physical album comes in two versions: Show Your Color and Moby Dick.
- "Oopsie (My Bad)" - 3:21
- "Bing Bing (빙빙)" - 3:35
- "What’s Up" - 3:48
- "Drinkin'" - 3:02
- "My Sun, My Moon, My Star (해 달 별)" - 4:01