f(x) member Luna showed off a mysterious look.

The picture of f(x) Luna was released through SMTOWN Facebook on June 10, with the post "You're feeling the electricity of the electric shock, right?"

In the picture, Luna is making a wide smile and a V. Her blonde hair and green eyes were especially eye-catching.

Internet users who saw the photo commented, "I love f(x)'s new song", "Luna's green eyes are so mysterious", and "I love f(x)'s concept this time.”

Photo: SMTOWN Facebook