快晴 (Kaisei)

==Background==
"Kaisei" is an original song by Orangestar.
This song was initially featured in the album Re:Start with Hatsune Miku as the vocal, and was released on August 30th. The uploaded version featuring IA was released on the 31st, which has reached the Hall of Legend and exceeded over 10 million views on Youtube.
==Preceding and succeeding versions==
==Lyrics==
Japanese (日本語歌詞) 	Romaji (ローマ字)
梅雨が明けるまであとどれくらい？ 	tsuyu ga akeru made ato dore kurai?
まだ紫陽花の光る朝 君の愚痴 	mada ajisai no hikaru asa kimi no guchi
夏の足音はすぐそこまで 	natsu no ashioto wa sugu soko made
ねぇ迎えに行こって僕を急かす 	nee mukae ni ikotte boku o sekasu
 	
君に言われるがまま路地を抜け 	kimi ni iwareru ga mama roji o nuke
あの時の坂を越え 虹を越え 	ano toki no saka o koe niji o koe
まだ誰もいない夏の空を 	mada dare mo inai natsu no sora o
全部全部二人占めにするんだ 	zenbu zenbu futari shime ni surunda
 	
なんて君は笑ってたよな 	nante kimi wa waratteta yo na
遠い夏の記憶 	tooi natsu no kioku
もう逢えなくても 	mou aenakute mo
二度と帰れなくても 	nido to kaere nakute mo
それは美しい 	sore wa utsukushii
僕らだけの夏だったろう 	bokura dake no natsu dattarou
 	
さよならI love you 	sayonara I love you
それで全て 	sore de subete
終わってしまうような 	owatte shimau you na
僕らじゃないだろう 	bokura ja nai darou
変わらないな 	kawaranai na
空も星も その泣き顔も 	sora mo hoshi mo sono nakigao mo
っていつか君と 	tte itsuka kimi to
また笑えますように 	mata waraemasu you ni
 	
そりゃ色々あっただろう 	sorya iroiro atta darou
今もあるだろう 	ima mo aru darou
でも笑いながら生きていく 	demo warai nagara ikite iku
「それが人世だ」って 	"sore ga jinsei da" tte
 	
そんな単細胞になれたなら 	sonna tansaibou ni nareta nara
どれだけ良いかって 	dore dake ii katte
過ぎ去っていく日々に意味はない 	sugisatte iku hibi ni imi wa nai
なら明日の僕は僕じゃない 	nara ashita no boku wa boku ja nai
そんな筈はないだろう 	sonna hazu wa nai darou
 	
泣いていたって空は晴れるよ 	Naite itatte sora wa hareru yo
君が濡らしたって滲まないほど 	kimi ga nurashitatte nijimanai hodo
あがいていたって空は星を降らすから 	agaite itatte sora wa hoshi o furasu kara
まぁ、生きていくよ 	maa, ikite iku yo
 	
I know this sky loves you 	
いずれ全て 	izure subete
変わってしまったって 	kawatte shimattatte
空は青いだろうよ 	sora wa aoi darou yo
忘れないさ 	wasurenai sa
でもまた出逢えますように 	demo mata deaemasu you ni
って生きて征くよ 	tte ikite yuku yo
君は笑っていて 	kimi wa waratte ite
==Derivatives==
==Other media appearances==
===Discography===
This song was featured in the following albums:
* 快晴 (Kaisei) (single)
* Re:Start (Miku's version)
* And So Henceforth
===Concerts===
The Miku version of this song was featured in the following concerts:
* Magical Mirai 2019
* Magical Mirai 2024 (Fukuoka, Day 1/Tokyo, Day 1 & 3/Osaka, Day 2)
===Video games===
This song was featured in the following video games:
*O.N.G.E.K.I. (Hatsune Miku's version)
* GROOVE COASTER 4MAX DIAMOND GALAXY (Hatsune Miku's version)
* (Virtual Singer version by IA; SEKAI version by Leo/need and MEIKO)
==Gallery==
<tabber>Games =
Games - Project SEKAI - 快晴.png|Music jacket featured in Project SEKAI COLORFUL STAGE! feat. Hatsune Miku
|-|Merchandising =
Orangestar - 快晴 (single).jpg|Cover art of the digital single快晴 (Kaisei)
</tabber>
==External links==
===Official===
===Unofficial===
Category:Original songs
Category:Japanese songs
Category:Songs featuring Hatsune Miku
Category:Songs featuring IA
Category:Partially bilingual songs
Category:Concert songs
Category:Video game songs
Category:Mobile game songs