愛言葉Ⅳ (Ai Kotoba Ⅳ)

==Background==
"Ai Kotoba Ⅳ" is an original song by DECO*27 featuring Hatsune Miku. It is the sequel to Ai Kotoba, 愛言葉Ⅱ (Ai Kotoba Ⅱ), and Ai Kotoba Ⅲ with different arrangement and lyrics.
A love and gratitude song where Miku expresses all of her feelings toward the special person who always has taken care of her. The lyrics make references to some of DECO*27's previous hits such as Hibana, Otome Kaibou and Vampire.
This is currently the fastest VOCALOID song to reach 1 million views on YouTube, taking 21 hours 49 minutes to reach this milestone.Twitter It has also received over 1 million views on Bilibili.
==Preceding versions==
==Lyrics==
<tabber>Japanese lyrics =
Japanese (日本語歌詞) 	Romaji (ローマ字)
想像なんてしてなかった現状　君もそう思った？ 	souzou nante shite nakatta genjou kimi mo sou omotta?
“最高”で止まらないように更新したい 	“saikou” de tomaranai you ni koushin shitai
 	
叶えたい夢まであとどれくらい？　誰も行ったことがない場所へ 	kanaetai yume made ato dore kurai? dare mo itta koto ga nai basho e
たどり着くまでは“僕ら止まれない”　たぶんしんどいけど、どうかよろしくね 	tadoritsuku made wa “bokura tomarenai” tabun shindoi kedo, douka yoroshiku ne
 	
ねえねえ　たまにメーデー　僕だけじゃ作れないモノ 	nee nee tama ni meedee boku dake ja tsukurenai mono
僕とか君とかあたしとか　恋とか愛とかまとめて全部 	boku toka kimi toka atashi toka koi toka ai toka matomete zenbu
君を置いてどっかに行っちゃうとか　ありえないよ 	kimi o oite dokka ni icchau toka arienai yo
 	
君がくれた音に　弾けた火花に 	kimi ga kureta oto ni hajiketa hibana ni
初めましてから　ずっと恋しちゃってるんだよ 	hajimemashite kara zutto koi shichatteru nda yo
君のいない未来考えらんないよ　これから先も二人がいいじゃん 	kimi no inai mirai kangaerannai yo kore kara saki mo futari ga ii jan
 	
一途になるほど　逃げたくもなったよ 	ichizu ni naru hodo nigetaku mo natta yo
散々な僕のこと　呼んでくれてありがとう 	sanzan na boku no koto yonde kurete arigatou
君のいない未来考えらんないよ　これから先も二人で、それがいいじゃん 	kimi no inai mirai kangaerannai yo kore kara saki mo futari de, sore ga ii jan
 	
妄想　膨らんでくストーリー 	mousou fukurandeku sutoorii
感傷　やけに凹んじゃって 	kanshou yake ni hekonjatte
代償　求め過ぎはやーよ 	daishou motomesugi wa yaa yo
終わんない愛の連盟、どうでしょ？ 	owannai ai no renmei, dou desho?
 	
ねえねえ　おいでメーデー　僕が君にできること 	nee nee oide meedee boku ga kimi ni dekiru koto
まだまだまだまだあるけど　驚かせたいから内緒なんだ 	madamada madamada aru kedo odorokasetai kara naisho nanda
君の愛がいつも勝っちゃうこと　許さないよ 	kimi no ai ga itsumo kacchau koto yurusanai yo
 	
君以外はヤダ　我儘はタダ 	kimi igai wa yada wagamama wa tada
変わらないトキメキを絶叫しちゃうのはバカ 	kawaranai tokimeki o zekkyou shichau no wa baka
 	
君がくれた音に　弾けた火花に 	kimi ga kureta oto ni hajiketa hibana ni
初めましてから　ずっと恋しちゃってるんだよ 	hajimemashite kara zutto koi shichatteru nda yo
君のいない未来考えらんないよ　これから先も二人がいいじゃん 	kimi no inai mirai kangaerannai yo kore kara saki mo futari ga ii jan
 	
一途になるほど　逃げたくもなったよ 	ichizu ni naru hodo nigetaku mo natta yo
散々な僕のこと　呼んでくれてありがとう 	sanzan na boku no koto yonde kurete arigatou
君のいない未来考えらんないよ　これから先も二人で、それがいいじゃん 	kimi no inai mirai kangaerannai yo kore kara saki mo futari de, sore ga ii jan
 	
乙女解剖で遊ぼうよ　ドキドキしたいじゃんか誰だって 	otome kaibou de asobou yo dokidoki shitai jan ka dare datte
アンドロイドガール　をかしくなっちゃった　痛みのないキスが離れない 	andoroido gaaru o kashiku nacchatta itami no nai kisu ga hanarenai
僕らヴァンパイア　いいよ　吸っちゃっていいよ 	bokura vanpaia ii yo succhatte ii yo
「もう無理もう無理」だって　悪い子じゃない 	"mou muri mou muri" datte warui ko janai
こんな歌歌ったんだって　君が輝けるように 	konna uta utatta nda tte kimi ga kagayakeru you ni
|-|Official English lyrics =
A situation I wouldn’t have imagined, did you feel the same?
It’s heating up inside my head, but I don’t want it to stop
How close are you to a dream come true? To a place no one has been to
“We won’t stop” until we get there. It will probably be tough, but let’s do it together
Hey, hey, the occasional mayday, something that I can’t make alone
I (Boku), You (Kimi), I (Atashi), “like” and “love” all together
Going somewhere and leaving you all alone is just not possible
The sound you gave me, the bursting HIBANA
From the first meeting, it was love at first sight
I can’t imagine a future without you, let’s make it the two of us together, now and forever
Stronger the one person commitment, the more I want to run away two
I only have three brain cells, thank you four inviting me
I can’t imagine a future without you, let’s make it the two of us together, yeah, now and forever
Delusions, the deepening story
Sentimentality, becoming super depressed
Compensation, there is no need for clinginess
Federation of never-ending love, how does that sound?
Hey, hey, c’mon mayday, what I can do for you
Is never, never, never ending, but I want to surprise you so it’s a secret
How your love always wins, so unfair!
I only want you, Selfishness is free
It’s stupid to Screeeeaming about the same butterflies
The sound you gave me, the bursting HIBANA
From the first meeting, it was love at first sight
I can’t imagine a future without you, let’s make it the two of us together, now and forever
Stronger the one person commitment, the more I want to run away two
I only have three brain cells, thank you four inviting me
I can’t imagine a future without you, let’s make it the two of us together, yeah, now and forever
Let’s dissect the girl’s heart, don’t you think anyone would want to be excited?
Android Girl, is acting up, the painless kiss won’t leave my mind
We’re vampires too, It’s ok to suck, go ahead
“I can’t take it anymore” is not such a bad boy
I’m singing a song like this to make you shine
</tabber>
==Derivatives==
==Other media appearances==
===Discography===
This song is featured on the following albums:
* 愛言葉IV (Ai Kotoba Ⅳ) (single)
* TRANSFORM
==Trivia==
* Aside from referencing its prequels, Ai Kotoba Ⅳ also features lines of several other DECO*27's works, including Salamander, Positive Parade, Ojama Mushi, Ghost Rule, Hibana, MKDR, Neo-Neon, Vampire, Otome Kaibou, Android Girl.
* References of other works on Ai Kotoba Ⅳ's illustration includes:
** Flowers - elements from Ai Kotoba Ⅱ's video.
** Angel and demon cookies - elements from Ojama Mushi II's video.
** Plate - element from Otome Kaibou.
** Hair and nail colors - elements from Ai Kotoba Ⅲ.
** Three-hearted decorative hair pin - color palette from Conti New's album cover; three hearts element from MANNEQUIN's characters design.
** Character design - reference from Hatsune Miku V4X's design.
** Posture and band aid - elements from Vampire.
** Right side, upper corner earphones and power button-shaped ring - elements from Android Girl.
==Gallery==
DECO27 - Ai Kotoba IV - full illustration.png|Full illustration by Hachisan
DECO27 - Ai Kotoba IV - single release.jpg|Cover artwork of the digital single
DECO27 - Ai Kotoba IV - 1M art.jpg|1 million YouTube views commemorative artwork
DECO27 - Ai Kotoba IV - 5M art.jpg|5 million YouTube views commemorative artwork
==References==
==External links==
===Official===
===Unofficial===
Category:Original songs
Category:Japanese songs
Category:Spin-offs
Category:Songs featuring Hatsune Miku