X:IN (엑신) is a five-member multinational girl group under Escrow Entertainment. They made their debut on April 11, 2023 with the digital single "Keeping the Fire".

On March 9, 2023, it was announced that the group will release their first pre-debut digital single titled "Who Am I" on March 12.

On April 5, 2023, X:in's official Twitter account revealed the schedule for their debut digital single "Keeping the Fire", which was released on April 11.

On June 7, Escrow Entertainment announced that Chi.u had departed from the group due to personal circumstances. X:in would continue with four members.

On July 8, Escrow Entertainment announced that Roa had left the group, and that new members Nizz and Hannah would be added to the group, thus reorganizing X:in as five members.

On August 5, they announced their first mini album Synchronicity, released on August 30. Read more on Last.fm. User-contributed text is available under the Creative Commons By-SA License; additional terms may apply.