Wendy shows off why she's the lead vocal of Red Velvet in her beautiful ballad OST for drama 'D-Day'!

The track titled "Let You Know" is the first OST released for the big-budget drama. It is definitely a high quality piece, sure to tug at your heartstrings. And of course, Wendy sounds flawless as usual.

Check it out below! Are you enjoying the drama 'D-Day'?