Well, I updated Purin's color-code by adding in a couple of the things I noticed from the PV. These are 98% sure are right, but since most of the girls sing to the song, I don't really know. The Sakura Chirari and watashitachi etc. parts I think are all the girls...But I'm not sure! So enjoy!
SAKURA CHIRARI
Umeda Yajima Arihara Nakajima
Suzuki Okai Hagiwara
sakura CHIRARI
namida nado niawanai
kono mama dakishimete
sakura CHIRARI
itsumademo sugu soba de
anata wo miteitai
[Ya/Su] suki ni naru no kowai nante
[Ok/Ha] hajimari no koro wa ne
[Um/Na] dakedo anata zenbu zenbu
[Ar/Su] uketomete mo kureta
tatoe ima mo wakaranai koto ga aru to shite mo
waraeru hi ga kirun dakara
sakura CHIRARI
[Um/Na/Su/Ha] miagereba utsukushii
[Um/Na/Su/Ha] yozora ni toketeyuku
watashitachi wa
[Ya/Ar/Ok] itsumademo te wo tsunagu
[Ya/Ar/Ok] kawaii koi wo suru
[Ya/Su] yume wo mita wa anata no yume
[Ok/Ha] tsurenaku shinaide yo
[Um/Na] chotto baka shi yatsuatari ne
[Ar/Su] yume no hanashi na no ni
to ni mo kaku ni mo asu made aenai genjitsu
setsunai kedo shiawase desu
sakura CHIRARI
[Ya/Ar/Ok] namida nado niawanai
[Ya/Ar/Ok] kono mama dakishimete
sakura CHIRARI
[Um/Na/Su/Ha] itsumademo sugu soba de
[Um/Na/Su/Ha] anata wo miteitai
"sakura CHIRARI"
miagereba utsukushii
yozora ni toketeyuku
watashitachi wa
[Um/Na/Su/Ha] itsumademo te wo tsunagu
[Um/Na/Su/Ha] kawaii koi wo suru
HEY! ONE MORE TIME!
sakura CHIRARI
[Ya/Ar/Ok]namida nado niawanai
[Ya/Ar/Ok]kono mama dakishimete
sakura CHIRARI
[Um/Na/Su/Ha]itsumademo sugu soba de
[Um/Na/Su/Ha]anata wo miteitai