Kekkon dekinai otoko, known in English as He Who Can't Marry, is a 2006 Japanese drama broadcast by Fuji TV. The theme song is "Swimmy" by Every Little Thing. The drama was produced by Kansai Telecasting Corporation and Media Mix Japan.

Sanada plays a salariman who just lost his job. Yonekura, his wife, is a dancer who gave up her career when they got married. In the middle of family crisis, Yonekura leaves to pursue her dream. Sanada is stuck with their only son. Suzuki, his old flame -turn jet set career woman- is forced to take care of them. Will the romance spark again, now that Sanada already has family, and Suzuki has a younger man, Makoto, beside her?

A single mother was murdered in a room in an apartment while the news of an indiscriminate murder of women was making headlines every day. At the same time, Kazuki Saito, her son, disappears. The public speculates who could be the culprit and they even have a type, and the police are also looking for him. Meanwhile, a girl named Sayo, wanders into the woods and meets the speculated culprit with a knife. What is the fate of the girl who met the murderer?

Protagonist Shinji Aratani is a man who lost everything around him—successful career, family, and friends—due to a twist of fate. His current job title is Chief of Registry Supervision Division of Ministry of Justice. Colleagues in other divisions look down on the Division saying nobody cares about their job and it's unneeded. But what they don't know is that the Division's true duty is to accomplish the top-secret mission from Parliamentary Secretary of Justice to "isolate time travelers in a special residential district and keep them under a close watch." In the near future, it's expected that time machine will be invented and there will be time travelers, each with their own purpose, coming back from the future to the present time. Registry Supervision Division was newly established in order to not let these time travelers change or affect the present and also to prevent big confusion from happening when the existence of time travelers gets revealed.