Released: December 2, 2016

Songwriter: Devyn Rush 제이큐 (JQ) David Amber 이스란 (Lee Seu Ran) 조윤경 (Cho Yoon Kyung)

[Verse 1]
무심한듯 네 시선을 멈추게 한 Dance
불안하게 요동치기 시작하는 Breath
리듬 속의 내 몸짓이 역시 내겐 (초면처럼)
빠져드는 Eyes 나를 바라봐

[Pre-Chorus]
(마치 홀린 듯이) 아무도 몰래
(맘을 뺏긴 듯이) 나로만 가득해
(깊이 빠진 듯이) 그래 그렇게 그래
그렇게 그래 그렇게

[Chorus]
Mystery
Mystery
Mystery
Mystery-tery
Mystery-tery
Myste–te-tery
Come and get it baby
Come and get it get it
Come and get it baby
Come and get it get it
Come and get it baby
Come and get it get it
3, 2, 1

[Verse 2]
나와 같이 춤을 추지 그댄 어느새
내게 맞춘 움직임 매너도 눈빛도 So well
리듬 속의 내 목소리 역시 내겐 (초면처럼)
스며드는 Eyes 날 더 원해봐

[Pre-Chorus]
(마치 홀린 듯이) 아무도 몰래
(맘을 뺏긴 듯이) 나로만 가득해
(깊이 빠진 듯이) 그래 그렇게 그래
그렇게 그래 그렇게

[Chorus]
Mystery
Mystery
Mystery
Mystery-tery
Mystery-tery
Myste–te-tery

[Verse 3]
Come on baby 참는 것은 해로워 whistle
참지 말고 다가와서 말해 줘 모두 쉿
최면 걸린 듯 Coach 대려가 날 사라지기 전
아슬하게 와
Look into my eyes 내게 말해봐

[Outro]
Mystery
Mystery
Mystery
Mystery-tery
Mystery-tery
Myste–te-tery
Come and get it baby
Come and get it get it
Come and get it baby
Come and get it get it
Mystery-tery
Myste–te-tery

HYO (효연)

Kim Hyo-yeon (born September 22, 1989), better known mononymously as Hyoyeon, is a South Korean singer and television personality. She debuted as a member of girl group Girls' Generation in August 2007, who went on to be one of the best-selling artists in South Korea and one of South Korea’s most popular girl groups worldwide.

Later in June 2016, Hyoyeon was featured in the song “Up & Down” from fellow Girls' Generation member Taeyeon’s second mini-album Why. In August 2016, she collaborated with miss A member Min and 2AM member Jo Kwon to form a special group named Triple T and release a single titled “Born to Be Wild”, featuring Park Jin-young, as part of S.M. Entertainment’s Station music project.

In December 2016, Hyoyeon released her first solo song since debut titled “Mystery” as another single for SM Station. To accompany her solo release, she performed the song on various Korean music shows and starred in her reality show, Hyoyeon’s 10 Million Likes 2.