Moonbin and Sanha are only a day away from their unit comeback!

On March 14 KST, the ASTRO members unveiled a second music video teaser for "WHO," the title track off of their second unit mini album 'REFUGE.' In the clip, the two are seen in a mysterious cathedral-like setting, joined by backup dancers as they perform a portion of the song's choreography in front of an altar of several lit candles.

Meanwhile, 'REFUGE' is set for release on March 15.

Check out the full teaser above!