Jeong Dae Yun

Yoon Hyun Woo is a devoted, hard-working, and loyal secretary to the Soonyang chaebol family, which runs the lucrative Soonyang Group business empire, founded by Jin Yang Cheol. During a power struggle between Jin Yang Cheol's children for control of the empire, Hyun Woo is ruthlessly betrayed and killed under the orders of an unknown member of the chaebol family. Miraculously he wakes up as a kid inside the body of the youngest member of the family – Jin Do Jun. After he realizes what has happened, Yoon Hyun Wo plots to use his new “identity” to formulate a hostile takeover of the group – and punish the people who killed him. But, will the cold-blooded and money-hungry CEO of Soonyang Group, one who firmly believes in right of primogeniture, be so easy to win over or conquer? Will Hyun Woo be able to wrest the reins from Jin Yang Cheol's children? And what role will be played in all this by a dogged public prosecutor named Seo Min Young, nicknamed “Soonyang Group Grim Reaper”? (Source: LuckyGirlGwenIce at MyDramaList) ~~ Adapted from the web novel "Youngest Son of a Conglomerate" (재벌집 막내아들) by San Gyung (산경).

Hwang Tae Hee is the daughter of a chaebol and a team leader at her workplace. She is married to Bong Joon Soo, who works at the same company. When Bong Joon Soo's ex-girlfriend, Baek Yeo Jin, who happens to be Hwang Tae Hee's rival as well, begins to work in her team, troubles start to surface. Tae Hee has to juggle her challenges in love with those at work, helping shape her boss and department director, Goo Yong Shik, from an insensitive and uninterested second-generation chaebol to a true leader. Tae Hee's seeming success in love, however, presents her with another problem as she begins to realize that marriage involves just as many obstacles to overcome.