Question

We Are Bulletproof: The Eternal

[Verse 1: Jungkook, V with Jungkook & j-hope]
Gajin ge kkumbakke eopseonne
Nun tteumyeon ppuyeon achimppun
Bamsae chumeul chumyeo noraehae
Geu kkeuchi eopdeon akbodeul
Ayy, urin hogiropge shout, "Da deonjyeobwa!"
Sesanggwa cheot ssaum, don't wanna die
But so much pain, too much cryin'
So, mudyeojineun kallal

[Pre-Chorus: V with Jimin, Jin & Jungkook]
Oh, I-I-I-I-I-I-I-I
We were only seven
(I-I-I-I-I-I-I-I) But we have you all now
Ilgobui gyeoulgwa bom dwie
Ireoke matjabeun sonkkeute
Oh, I-I-I-I-I-I-I-I
Yeah, we got to heaven

[Chorus: Jimin, Jungkook, V & Jin]
Naege doreul deonjyeo (Oh-oh)
Urin geobi eopseo (Oh-oh) anymore
We are, we are together, bulletproof (Yeah, we have you, have you)
Tto gyeouri wado (Oh-oh)
Nuga nal magado (Oh-oh) georeoga
We are, we are forever, bulletproof (Yeah, we got to heaven)

[Verse 2: SUGA & RM]
We are bullet-bullet-bulletproof
Bujeongjeogin siseone matseo urin haenaetgu
Nappeun gieokdo maneun siryeondo
Da hogiropge urin maganaetji bulletproof
Neul saenggakae, "Ajik kkumsogin geon anilkka?"
Gireotdeon gyeoul kkeute on ge jinjja bomilkka?
Modu biutdeon
Hanttaen bukkeureopdeon ireum
Igeon soero doen jeungmyeong, "bullet-proof"

[Pre-Chorus: Jungkook with Jin, V & Jimin]
Oh, I-I-I-I-I-I-I-I
We were only seven
(I-I-I-I-I-I-I-I) But we have you all now
Ilgobui gyeoulgwa bom dwie
Ireoke matjabeun sonkkeute
Oh, I-I-I-I-I-I-I-I
Yeah, we got to heaven

[Chorus: Jimin, Jungkook, V & Jin]
Naege doreul deonjyeo (Oh-oh)
Urin geobi eopseo (Oh-oh) anymore
We are, we are together, bulletproof (Yeah, we have you, have you)
Tto gyeouri wado (Oh-oh)
Nuga nal magado (Oh-oh) georeoga (Georeoga, ah)
We are, we are forever, bulletproof (Yeah, we got to heaven)
[Bridge: Jimin, Jungkook, V with Jimin, (Jin) & [Jin + Jungkook]]
(Oh-oh, oh-oh) Dasin meomchuji aneullae
Yeogi uriga hamkkeigie (No-oh, no-oh)
Tell me your every story
Tell me why you don't stop this
(Tell me, why you still) walkin', (walkin' with us?)
[Yeah, we got to heaven] (Yeah, eh-eh-eh-eh-eh)

[Chrous: Jimin with Jin (or V), Jungkook, Jin + Jungkook & [V]]
Naege doreul deonjyeo (Oh-oh)
Urin geobi eopseo (Oh-oh) anymore
We are, we are together, bulletproof (Yeah, we have you, have you)
Tto gyeouri wado (Oh-oh)
Nuga nal magado (Oh-oh) georeoga
(We are, we are forever), [bulletproof] (Yeah, we got to heaven)

[Outro: Jungkook, V, Jimin & Jin, Jungkook & Jimin]
Oh-oh-oh, oh-oh-oh-oh, oh-oh-oh, oh-oh-oh-oh, oh
Oh-oh, oh-oh, oh-oh (Yeah, we have you, have you)
Oh-oh-oh, oh-oh-oh-oh, oh-oh-oh, oh-oh-oh-oh, oh
Oh-oh, oh-oh, oh-oh (Yeah, we are not seven, with you)
Oh-oh-oh, oh-oh-oh-oh, oh-oh-oh, oh-oh-oh-oh, oh
Oh-oh, oh-oh, oh-oh (Yeah, we are not seven, with you)
Yeah, we are not seven, with you​

Answer 1

RO stands for Reverse Osmosis. It is a process that helps RO water purifier remove unwanted ions, dissolved solids and TDS from the water. Reverse osmosis is the opposite of osmosis.

It gave me chills when I heard it.

Love this song (≧▽≦)(≧▽≦)