LOONA and producer Ryan Jhun have revealed the preview of their upcoming collaboration single 'Not Friends.'

The producer, his label Big Ocean ENM, and LOONA members HeeJin, Kim Lip, JinSoul, and Yves, are working together for the second single of his ongoing music project 'MAXIS.' A teaser clip featuring the album cover teaser revealing an audio teaser of their collaboration was already released as the group prepares to release their single.

Then on September 2 at midnight KST, the group released a chilling teaser poster showing intense images of the girl group members. LOONA x Ryan Jhun's "Not Friends" is scheduled to drop on September 3, KST.