This anime is meant for fun, nothing else. You can watch an episode without watching previous episodes, or knowing previous lore. This anime is just for the fun of watching Sonico is her daily life. It is an awesome anime to watch if you don't want a heartfelt romance, or comedy. Each episode is fun, fresh and exciting to watch, even if you marathon them all. Overall it is good, the story is usually very innocent, the art is wonderful, the sound is what you expect from a music based anime, the characters, though bland, are awesome in their own sense, and the enjoyment isan incredible 9/10 for me. I had fun watching this, and I recommend watching it if you do not want commitment, or want to follow each episode to find out what happens.
I watch many romantic comedies, and this is an anime that helped me feel better after watching the final 2 episodes of Haganai Next.
I wish to see more of this fun anime, and hope people enjoy it as much as I did.