In March 2019, Mamamoo released their ninth EP, White Wind, which served as the fourth and final installment of their "Four Seasons, Four Colors" series of albums.

Shortly after, they embarked on their fifth concert tour 4Seasons F/W, which saw them visit Japan, Taiwan, and Hong Kong in addition to their native South Korea.

In July 2019, it was announced that Mamamoo would join the cast of Queendom, a competitive reality television show, in which six trending female K-pop acts competed for their own comeback showcase to air on South Korean pay TV channel Mnet.

[2] On November 1, the impending release of the group's second full studio album was announced through Mamamoo's official social media accounts.

[14] "Hip" would later go on to be certified platinum by the Korea Music & Content Association (KMCA) for surpassing 100 million streams in November 2020,[15] earning the group their second certification after "Starry Night" in 2018.

It debuted and peaked at number one on the Gaon Digital Chart in South Korea, becoming their third number-one album after Yellow Flower (2018) and White Wind (2019).