A.C.E's Byeongkwan suited up in moon concept images for 'SIREN:DAWN'.

In the teaser images, Byeongkwan wears a loose black suit with long silver jewelry and a streak of bright blue hair. A.C.E are dropping their fifth mini album 'SIREN:DAWN' and title song "Higher" on June 23 KST.

So far, A.C.E have teased ethereal, mysterious concepts like their siren sun, dark, murky, and veiled teasers.

Stay tuned for updates on A.C.E's 'SIREN:DAWN' comeback!