[7][8] On July 21, 2023, NewJeans released their second extended play, Get Up, in which Haerin was credited for the first time as a lyricist for her contribution to the song "New Jeans".

[9][10] On June 2, 2024, Haerin debuted as a special MC for SBS' K-Wave Concert Inkigayo held at the Inspire Arena in Incheon, South Korea, alongside Yunho and Han Yu-jin of boy groups Ateez and Zerobaseone respectively.

[11] Following her debut, Haerin quickly went viral in South Korea and abroad for her distinctive facial features, reminiscent of a cat, which have become a defining characteristic of her persona.

[4][12] The Times of India noted that "as NewJeans breaks barriers and re-defines standards, Haerin stands at the forefront, a beacon of talent and style".

[15] In May 2024, she starred in Dior's Denim Oblique Jacquard campaign, developed by its creative director Maria Grazia Chiuri.