Two Wives

Kang Chul-soo (Kim Ho-jin) divorces his wife Yoon Young-hee (Kim Ji-young) to start anew with single mother Han Ji-sook (Son Tae-young), with whom he had carried on an affair. After the split, however, Chul-soo gets into a car accident and wakes up with no memory of Ji-sook. Chul-soo thinks he is still married to Young-hee, and Young-hee and everyone else can only play along while he recovers. [About] Two Wives is a 2009 South Korean television series starring Kim Ji-young, Son Tae-young, Kim Ho-jin, and Kang Ji-sub. The daily drama aired on SBS on Mondays to Fridays at 19:20 from May 4 to October 30, 2009 for 120 episodes. The series was part of the "Wife Trilogy," which includes Temptation of Wife and Wife Returns.  [Source: Wikipedia]