Ai, living as the wife of the president of a construction company. Her husband, Yūya, is an excellent manager and lives without any financial worries. It was Tatsuo who had a one-sided love for Ai during his student days. Tatsuo is a personality anomaly and still harbors obsessive feelings for Ai. And now, several years after Ai and Tatsuo became adults, Tatsuo's first job was at Yūya's company. Tatsuo, who had an unexpected encounter, overflows with his feelings for Ai, and jealous of Ai's elegant life, takes abnormal actions...