Matsuri Miyashita is an ordinary office lady (aka OL) with a crush on the handsome prince of a partner company. Seiichiro Kiyokawa is an experienced salaryman with 30 years in the sales department, a devoted family man. One day, the lives of these two unrelated people come together in an unfortunate way. "Why is there a strange old man's voice inside my head?" "Why do I look like a girl?"