[Intro: Tzuyu, Nayeon]
Ah, ah, ah, ah
Yeah, the best thing I ever did
Ah, ah, ah, ah
Hmm

[Verse 1: Mina, Momo]
December ichi nen owari kimi to I remember
Omoide yuki no you tsumori
Nokoshita ooku no
Kotoba ga hanarenai dokidoki

[Pre-Chorus: Jeongyeon]
Itsumo samishii dake datta hazu no
Juunigatsu mou samishikunai, ooh

[Chorus: Nayeon, Jihyo]
Kotoshi no ichiban wa deatta koto
Deatta koto, deatta koto
Kotoshi no shinai ii koto ichiban wa
Wakarenakatta koto issho na koto

[Post-Chorus: Tzuyu, Sana, Mina]
All I wanna do, all I wanna do
Towa ni, towa ni, towa ni, towa ni
Kimi to futari
All I wanna do, all I wanna do
Towa ni, towa ni, towa ni, towa ni
Onaji futari

[Verse 2: Sana, Dahyun]
Wakaranai kedo barebare na no ka
Tomodachitachi kara katte waratte tatte
Hitori de ite mo
Ushiro ni kimi ga iru you de oh
Mimi ga akaku natte dou shiyou
Omou no kimi zutto

[Pre-Chorus: Chaeyoung]
Itsumo samishii dake datta hazu no
Juunigatsu mou samishikunai, ooh

[Chorus: Nayeon, Jihyo]
Kotoshi no ichiban wa deatta koto
Deatta koto, deatta koto
Kotoshi no shinai ii koto ichiban wa
Wakarenakatta koto issho na koto

[Bridge: Dahyun, Nayeon]
Kotoshi little by little
Sugoshite ooku no koto wo
Imi wo omoiukaberu kedo
Nande kimi to issho no shunkan dake na no?
Koi shita mitai

[Chorus: Nayeon, Jeongyeon, Jihyo]
Kotoshi no ichiban wa deatta koto
Deatta koto, deatta koto (Oh)
Kotoshi no shinai ii koto ichiban wa (Ooh woah)
Wakarenakatta koto issho na koto (issho na koto)

[Post-Chorus: Tzuyu, Momo, Jeongyeon]
All I wanna do, all I wanna do
Towa ni, towa ni, towa ni, towa ni
Kimi to futari (kimi to futari)
All I wanna do, all I wanna do
Towa ni, towa ni, towa ni, towa ni
Onaji futari

[Outro: Jihyo, Nayeon]
Ah, ah, ah, ah
Yeah the best thing I ever did
Ah, ah, ah, ah
The best thing I ever did