What is the broken ring manga?

Unfortunately, as an AI language model, I am not able to review the manga quality or provide an opinion on the storyline. However, I can provide some basic information about "The Broken Ring" manga.

"The Broken Ring," also known as "Kowareta Ringo," is a mystery psychological thriller manga written and illustrated by Ayako Noda. It was first serialized in Kodansha's "Afternoon" magazine from 2007-2009 and was later compiled into three tankobon volumes.

The story revolves around a woman named Mai, who suffers from amnesia and starts to experience horrifying and surreal dreams. With the help of a detective named Shinobu, she sets out to uncover the truth behind her past and the broken ring, a symbol that seems to hold some significance to her past.

The manga has received positive reviews for its atmospheric and suspenseful storytelling, with some comparing it to the works of David Lynch. However, it may not be suitable for all readers as it contains mature themes and disturbing imagery.