[Verse 1: Yedam, Asahi, Mashiho, Jaehyuk]
Gachi isseul ttae nan stress off
Amudo moreuneun nae moseup
Boyeojul su inneun neoneun best of
Geokjeongeun pass it
Keep balling, maeil gachi neullyeo kemi
Siltaraecheoreom eongkyeo inneun urideul
Haruga neul play the game
Jiruhal teum eopseo
Gagetdaneun sigan bonaego whatever urikkiri
Milly, milly, rock it chumeul chumyeo happiness (Yeah)

[Pre-Chorus: Jeongwoo, Jihoon, Yoshi, Hyunsuk]
You can play with me again
Binjaril chaеwojwo neon day by day
Yeongwonhagil bara truth, the swеar (Yosh!)
Unbelievable maeil nan eomjil chikyeosewo
Jimuneun seontaen hangsang haneul wireul bogo isseo
Mal an haedo ammukjeogin uriui chemistry (Chemistry)
Igeol eojjae bujeonghanya we're the one (One, one, one)

[Chorus: All, Junkyu, Junghwan, Doyoung, *Yedam*]
Oh-ayy-oh-ayy-oh
Best friend forever
Oh-ayy-oh-ayy-oh
Best friend forever
Mugeoun cheoreun urin deulji aneullae
Gabyeoun misoro gyesok muldeurige
Oh-ayy-oh-ayy-oh
*Uri kkirikkiri best friend forever*

[Verse 2: Junkyu, Junghwan, Hyunsuk]
Oneul mwo hae myeot sideun gane
Jamsi eolgurina boja eodideun gane, yeah, yeah
I'm fine, jogeum meoreodo joa
Uri hamkke handamyeon (7Chill, go)
Oh, hold on, wait
Eolgure meokgureum beim
Bineun wae tto oneunde
Hommie, gaja, let's go chill
Dramatichan wiron mothajiman da malman hae
Jibungeun mot dwaedo usani doeeojul tenikka, everyday

[Pre-Chorus: Jihoon, Doyoung, Haruto, Hyunsuk]
I can heal you all day
Nega jichil ttaemada day by day
Pyeongsaeng dongan urin truth, the swear (Ruto!)
Gachi isseul ttaen eodideunji noriteo (teo)
Gibun jeonhwan jom hago sipeum bulleo, call (Call)
Neoneun nago naneun neogo gachi utgo ulgo
Jungmagouga ttaro eopda, we are the one (One, one, one)

[Chorus: All, Jaehyuk, Doyoung, Mashiho, *Junkyu*]
Oh-ayy-oh-ayy-oh
Best friend forever
Oh-ayy-oh-ayy-oh
Best friend forever
Mugeoun cheoreun urin deulji aneullae
Gabyeoun misoro gyesok muldeurige
Oh-ayy-oh-ayy-oh
*Uri kkirikkiri best friend forever*

[Bridge: Jeongwoo, Asahi, Yedam, Jihoon]
Oh, jeo haneuri muneojyeo naeryeodo
Meoljjeonghadeon ttangi kkeojindaedo
Byeonhaji anneun yeongwonhan urin best friend
Oh, jigeumi gwageoga doeeogado
Al su eomneun miraega onda haedo
Kkeuteopsi ieojineun chueogi doeeojugil

[Refrain: Hyunsuk, All, Jeongwoo]
Best friend forever
La, la-la, la, la-la, la, la-la-la-la
La, la-la, la, la-la, la, la-la-la-la
Best friend forever
La, la-la, la, la-la, la, la-la-la-la
La, la-la, la, la-la, la, la-la-la-la
Uri kkirikkiri best friend forever