It is " Karui Kimochi no julia/'軽い気持ちのジュリア" by Noriko Sakai.
If you know Japanese, and can help me, by sharing the translation to english of the song, I'll really appreciate it!
Thanks!

Love it or hate I don't mind as long a you read itI will now do all my best to support the cause of people with Social Anxiety Disorder. This is a cause that is really important to me, since my mother and many friends suffered of this illness. I, myself, have Anxiety Disorder and Bipolarity and I'm still fighting to live a normal life. Fortunately, I've recently had help and I'm getting better as the days pass. Living with Anxiety Disorder is really difficult. Most people will never get the help they need, or be laugh at by people who don't understand what they are going through. I was also surprised to see many people I look up too who also have mental illness. You are not alone. Stay stron