[tenshi no hane]

^ thanks for posting!

A quick translation of Kana's message:

When you're in your teens, you don’t really know what you want to do yet.
And even when you do figure out what you want, you’re not sure how to get it.
You’re busy with school, club activities and part-time jobs but it feels like something is lacking.
Seeing people work hard while being his or herself makes you envious.
You wonder: "Am I good enough the way I am now?"
But everyone in their teens has plenty of chances. A fun, undiscovered world is waiting for you!
Start walking on the road to adulthood so you’ll experience many beautiful things☆
"Day 7" is a song which contains this encouraging message!
May everyone be happy☆