Erika lives as the wife of the young president of a small construction company. Yugo had a crush on Erika when they were students. Yugo has a strange personality and hardly goes to school, and he still has obsessive feelings for Erika. Now, several years after Erika and Yugo become adults, Yugo has found a job at Makoto's company. After this unexpected encounter, Yugo's feelings for Erika overflow, and he becomes jealous of Erika's lavish lifestyle, leading to abnormal behavior...