Ai lives as the wife of the president of a construction company. Her husband, Yuya, is an excellent businessman and they live a comfortable life financially. Tatsuo had a crush on Ai when she was a student. Tatsuo has a personality disorder and still has obsessive feelings for Ai. Now, several years after Ai and Tatsuo became adults, Tatsuo has found a job at Yuya's company. After this unexpected encounter, Tatsuo's feelings for Ai overflow, and he becomes jealous of Ai's luxurious lifestyle, leading him to behave abnormally...