RIIZE will present their first drama OST since debut.

RIIZE will release "Behind The Shine" on music platforms at 6 PM on April 18. The song is the theme for the MBC Friday-Saturday drama The 21st Century Grand Prince's Wife.

"Behind The Shine" is a pop track. A calm electric guitar melody is layered with a dreamy mood. Over restrained sound, RIIZE's emotional vocals are built up.

The lyrics calmly convey feelings that could not be expressed. It enhances immersion in the narrative of the main characters, including Byeon Woo-seok and IU, and is expected to leave a deep impression on viewers.

In particular, lyrics such as "Forgotten emotions pour down slowly / I will stay here quietly, only shining on you" stand out. The production team noted that it "sweetly increases immersion."

A representative said that RIIZE will present a lyrical sensibility different from the energy shown on stage through their first K-drama OST.

The 21st Century Grand Prince's Wife is set in a constitutional monarchy Korea in the 21st century. It tells the story of a man and a woman overcoming the limits of status, presenting a romance that forges a different fate.

Episode 3 aired on April 17. The contract marriage between Seong Hee-joo (IU) and Grand Prince Ian (Byeon Woo-seok) has begun in earnest, raising viewers' excitement through their chemistry.

Episode 4 will air today at 9:50 PM.