Im not going to give a summary to this anime like other reviewers do I'm going to tell you why you should watch this. This anime is for adults that like music, anime and a quick fun time. All the characters are adults there is drinking and smoking but no profanity, no sex scenes or nudity and the only kids(teenagers) you see are in flashbacks. This has pg rating so you can still watch with your family or adult friends and not be embarrassed of any lewd scenes.
My first reaction to this anime caught me off guard; to see an anime not start in a high school or teenager being the MC. I thought i was reading a manwha(Korean mangas). The characters are cute both male and females in their own way. Seeing them be adults and still have dreams of making it big in music is great.
For any other reason you should give it a try because the music is great, the anime is top notch. There might be some ester eggs for your adult mind to pick up with the music and character references. It was 100% made with us in mind give it a shot.