Title Year Peak chart positions Sales Album KOR [24] KOR Hot 100 [25] "Tonight" 2012 102 — N/A Five Beats of Hearts "Hasta Luego" 198 — "Love Sick" 2013 70 56 "Oppa, You're Mine" 2014 110 — Fall Into Temptation "Phone Number" 2015 — — "Skip" 282 — KOR: 5,076+ [26] Skip "The Secret" (알쏭달쏭) 2016 371 — KOR: 3,614+ [27] S-The Secret "—" denotes releases that did not chart or were not released in that region.