Lovelyz melakukan comeback dengan lagu Beautiful Days / When We Were Us (그 시절 우리가 사랑했던 우리) dari album Once Upon A Time.
Lirik Beautiful Days / When We Were Us (그 시절 우리가 사랑했던 우리) – Lovelyz
ajigdo pyeolchyeobomyeon us-eum-i nawa
gobge jeob-eodun cheosnal-ui chueog han jang
eojjeomyeon neodo gieoghago iss-eulkka?
puspushaess-eossdeon geudaewa naseuchin du son-eul jab-eulkka malkka
naenae ttam-i ssog bae issdeon neoui son
gwaenhi gung-geumhae geuttaeui
ni nun-e bichideon
nado cham yeppeoss-eulkka?ij-ji ma
uliga uliyeossdeon nal-ui nunbusimgwa
geu an-e geulimcheoleom nalanhaessdeon du salam
jeongmal, kkumboda kkumgatjanh-a
geu sijeol-ui neowa nageogjeong ma
ulil ilh-eun gyejeol-i seulpeujin anhdolog
geudaeleul jogagjogag moa ganjighal geoya
annyeong, ijeneun dwidol-aga
naeil mannal geoscheoleomooh yeah-
aleumdawo yeojeonhinaman dam-anaedeon ni nunbichgwa
cheoeum joh-ahae malhadeon geu sungan
geujeo ilgi sog geulssilo
balaejyeo gagien
ajig-eun akkabjanh-aij-ji ma
uliga uliyeossdeon nal-ui nunbusimgwa
geu an-e geulimcheoleom nalanhaessdeon du salam
jeongmal, kkumboda kkumgatjanh-a
geu sijeol-ui neowa nageogjeong ma
ulil ilh-eun gyejeol-i seulpeujin anhdolog
geudaeleul jogagjogag moa ganjighal geoya
annyeong, ijeneun dwidol-aga
naeil mannal geoscheoleomneol hyanghaeseo mogsolil geonnebwado (geulaedo)
ijeneun manh-i neuj-eun honjasmal-il geos gat-a, geulae gwaenchanh-aoneul-eseo geol-eum-eul han baljjag
olmgyeogamyeon jigeum-ui neowa nan
hal su eobs-i chueog-i doegessjiman
hanaman al-ajwo
jinsim-ieossdan geolissjanh-a
eolyeompus-i nan al geos gat-a
geuttaeui neowa nan cham nun-i busyeossdaneun geol
dasin, kkeul-eoan-eul su eobsneun sigan-in geolij-ji ma
uliga uliyeossdeon nal-ui nunbusimgwa
geu an-e geulimcheoleom nalanhaessdeon du salam
jeongmal, kkumman gat-assjanh-a
geu sijeol-ui neowa naulji ma
nan aju olaedolog sojunghi hal teni
onjong-il neoman pigo jideon naui haluleul
annyeong, ijen dwidol-aga
naeil mannal geoscheoleom