SECRET reveals Sunhwa's teaser photo for upcoming mini-album "Letter from SECRET" + reveals video teaser for "YooHoo"

SECRET has revealed the final individual teaser photo featuring Sunhwa.

The previous teaser photos featured members Ji Eun, Hyosung, and Hana (Zinger). They have also revealed a video teaser for their title track "YooHoo".

SECRET will return on April 30th with their fourth mini album "Letter From SECRET".

Check out Sunhwa's teaser photo above and video teaser, after the jump.