I followed romanised hangul to make pronunciation as accurate possible.
The bolded, CAPITALISED and in (bracket) is the FANCHANT so just chant those.
P.S Lee Heeseung's name is actually 이 희승 (Ee Heuiseung) but I decided to go with the official English alphabets of his name.
(YANG JEONGWON, LEE HEESEUNG, PARK JONGSEONG, KIM JAEYOON, PARK SEONGHOON, KIM SEONOO, NIKI EN-HY-PEN!!)
Ijen da keonneun dae
Wae jakku ae chwigeupae
Jeongmal keotdaneunde
(OH YEAH OH YEAH)
Kiman keun ge anya
Gwiyeopda jom haji ma
Geu useumeun mwonde
Got alge doel geoya
Gangaji chwigeupajiman
(ALL DAY ALL NIGHT)
Naeilbuteon naega
Naega neol jikyeojul geoya
(ALL DAY ALL NIGHT)
Ja ijen naege gidae jeongmallo
(IJEN NAEGE GIDAE JEONGMALLO)
Ijen naege gidae jeongmallo
(IJEN NAEGE GIDAE JEONGMALLO)
(WAE NEON) utgiman hae (NAE MAMEUL) mollajwo wae neon
Ijen naege gidae jeongmal (JEONGMAL)
Ijen naege gidae jeongmal (JEONGMAL)
Love love (LOVE LOVE)
Love love (LOVE LOVE)
My 10 months' love
Seotureun nae momjisi
Jogeum eorin nae maltuga
Mideopjaneun geol ara
Hajiman gidaryeo
Kimankeum mamdo jaraseo
(ALL DAY ALL NIGHT)
Naeilbuteon naega
Naega neol jikyeojul geoya
(ALL DAY ALL NIGHT)
Ja ijen naege gidae jeongmallo
(IJEN NAEGE GIDAE JEONGMALLO)
Ijen naege gidae jeongmallo
(IJEN NAEGE GIDAE JEONGMALLO)
(WAE NEON) utgiman hae (NAE MAMEUL) mollajwo wae neon
Ijen naege gidae jeongmal (JEONGMAL)
Ijen naege gidae jeongmal (JEONGMAL)
Love love (LOVE LOVE)
Love love (LOVE LOVE)
My 10 months'
Love love (LOVE LOVE)
My 10 months'
love
Meotjige byeonhalge
Woo love nege eoullige
(NEOMAN INJEONGHAE JUMYEON DWAE)
Ja ijen naege gidae jeongmallo
(IJEN NAEGE GIDAE JEONGMALLO)
Ijen naege gidae jeongmallo
(IJEN NAEGE GIDAE JEONGMALLO)
(WAE NEON) utgiman hae (NAE MAMEUL) mollajwo wae neon
Ijen naege gidae jeongmal (JEONGMAL)
Ijen naege gidae jeongmal (JEONGMAL)
Love love (LOVE LOVE)
Love love (LOVE LOVE)
My 10 months'
Love love (LOVE LOVE)
My 10 months' love
(YANG JEONGWON, LEE HEESEUNG, PARK JONGSEONG, KIM JAEYOON, PARK SEONGHOON, KIM SEONOO, NIKI EN-HY-PEN!!)
