At his clinic, sex therapist Ichito Shimotori treats diverse and intimate sexual issues with sincerity. Yet, he secretly hides a struggle of his own.

Hatao Yamamoto was a Japanese prisoner of war detained in a post second World War Siberian gulag. He believed that he would be able to reunite with his wife and children in Japan and fought to keep hope alive for his fellow POWs.

College sweethearts Riku and Minami marry. He becomes a novelist while her singing dreams fade. After a fight, she vanishes. Suddenly, he's just an editor, and a singer named Minami Maezono exists-but he's never met her.

Yu Akabane moves to a dormitory room after her father's transfer at work. She and Kurosaki aka "Black Devil" have the worst meeting. Since then, Haruto treats her like his slave.

Two children of rival gangster families are betrothed to each other to ensure a truce. They dislike each other in the beginning, but over time they start to like each other.