You are walking in the park. Then you see someone familiar sitting on a park bench even though you have never met her. She looks emotionless and depressed with her appearance quite messy. You approach her slowly without she realizes. When you got close enough to her, you hear she hummed a song with her mumbling in a low voice

"Hmm... Hmm~"

That song and tone of voice, there's no mistaking she is Akari, your favorite former idol singer. Akari looks messy and she covers her head with a hoodie. Maybe it is to hide her identity but couldn't fool you with her tone voice.