I've found the lyrics, for Passion! x3

Omoidaseba haruka haruka
Mirai wa doko made mo kagayaiteta
Kirei na aozora no shita de
Bokura wa sukoshi dake obiete ita
Natsukashii iro ni mado ga somaru
Mae wo muitereba
Mata aemasu ka
Mirai wa doko e demo tsudzuiteru 'n da
Ooki na kanban no shita de
Jidai no utsuroi wo mite itai na
Nido to aenu
Hito ni basho ni
Mado wo akeru
Omoidaseba haruka haruka
Mirai wa doko made mo kagayaiteta
Kirei na aozora no shita de
Bokura wa itsumademo nemutte ita
Zutto mae ni suki datta hito
Fuyu ni kodomo ga umareru sou da
Mukashi kara no kimari goto wo
Tama ni utagaitaku naru yo
Zutto wasurerarenakatta no
Nengajou wa shashin tsuki kana
Watashitachi ni dekinakatta koto wo
Totemo natsukashiku omou yo
Aozora no shita de