Review of Sing "Yesterday" for Me

Yesterday wo Utatte or as I would like to call it "Battle of the Simps" is what would you get if you took a mediocre manga and tried shoving it into a 12 episodes anime. The producers tried to trap people into watching this with a cool introduction and atmosphere, but everything is just dull afterwards. The story revolves around 2 guys "Rikuo and Rou" going for the same whiny girl "Shinako". Now Shinako doesn't know what to do, she grew up with Rou and she wants him to stay as family, she sees Rikuo as a best friend, yet manages to keep both guys hanging for her. Wealso have Haru, the cool girl with a crow who follows her everywhere and she loves Rikuo more than anyone else, but he doesn't really care.
As a manga reader, Shinako comfortably took place in my top 10 most hated anime characters.
Going further than that would force me to spill out spoilers as I don't really have much content to talk about.

The amount of frustration from watching this was overwhelming.
After omitting third of the manga characters and events, story progression could be simplified to teenagers walking others home.
No appropriate character buildup. Repetitive and disappointing overall experience.

TLDR,
What is cool: Crow and girl
What is bad: Everything else.
If you are interested, read the manga.