Newlywed Yuka struggles with various issues in her life with her husband Kazuya. She suffers emotional distress from constant mistreatment by her mother-in-law Kazuko and growing sexual incompatibility with her husband. Despite her love for Kazuya, the burden becomes unbearable. One day, she witnesses a forbidden relationship between her brother-in-law and her mother-in-law. This shocking discovery becomes the turning point that drastically changes her life.