Bolbbalgan4 merilis lagu Only Me, Spring / Bom (나만, 봄) dari album Youth Diary 1: Flower Energy. Bersamaan dengan MV ini, mereka juga merilis MV untuk lagu Stars Over Me (별 보러 갈래?).
Lirik Only Me, Spring / Bom (나만, 봄) – Bolbbalgan4
andwae geumandwo geogikkaji hae
deo dagagamyeon neo jeongsin mos chalyeo
andwae geumanhae kkoch-eun neoh-eodwo
geunyang jom balam-i bulge nwajwowae geuleolkka salamdeul-eun geunyang bomgiun-i joh-a
nunchi eobs-i bakk-eul naganeun geolkka
wae ileolkka mwoga seollendago bombalam-i joh-a
nae mamdo moleugo deo bul-eowaflower sunshine wanbyeoghan haluleul
sasil neowa geol-eul su issdamyeon eolmana joh-eulkka
joh-ahandago malhagiga museowoseo
ne gyeot-eul maemdolgo issneun nan
beojkkochdo mwogo da pil-yo eobs-eo naneun
ne gyeot-e issgo sip-eo ttag but-eoseo
bom-i jinagal ttaekkaji daleun salam
da salajyeola naman, bomwae geuleolkka salamdeul-eun geunyang bomgiun-i joh-a
nunchi eobs-i bakk-eul naganeun geolkka
wae ileolkka mwoga seollendago bombalam-i joh-a
nae mamdo moleugo deo bul-eowaflower sunshine wanbyeoghan haluleul
sasil neowa geol-eul su issdamyeon eolmana joh-eulkka
joh-ahandago malhagiga museowoseo
ne gyeot-eul maemdolgo issneun nan
beojkkochdo mwogo da pil-yo eobs-eo naneun
ne gyeot-e issgo sip-eo ttag but-eoseo
bom-i jinagal ttaekkaji daleun salam da salajyeolaeonje bom-i wassneunji nae mamdo moleugo
bombalam-i jakkuman bul-eowa
ne gyeot-e ttag but-eoseo tteol-eojiji anhgo sip-eo
nae mam-eul ije malhago sip-eo
beojkkochdo mwogo da pil-yo eobs-eo
naneun ne gyeot-e issgo sip-eo ttag but-eoseo
bom-i jinagal ttaekkaji daleun salam
da salajyeola naman, bom