I just want to comment about her "Secret" thing.
like she said, "we all have secrets". I don't think that we will hear her secret ever, or maybe we all have already, her songs are pieces of her heart to us, the lyrics are what she wants to tell us, so in someway theyre all "Secrets" from ayu ^^
secrets are just part of us, we are not telling everyone what we are thinking inside all the time. sometimes we feel like we have to tell someone about something, but we don't do it, because that may hurt that person, so thats a secret already.
even we "lie to ourselves" sometimes, and keep that as a secret inside of us.
there are many sorts of secrets in this life