Rise of the Prince (世子的崛起) by 我的长枪依在

Love the psychological/sociological lectures on this one. 

Crossing the Warring State by Fuyan Weiying - this one got a heavy drama.. throw lot of tears.. not your usual OP/wishful type of conquest. 

穿越战国之常磐红叶补更 by 扶摇微影

Title: Lord of Money

(note: not the God of Money) 

Authors: Mu Jang and Son Ju Hwan

Adapted to Manhwa, Available in GooglePlay Books

Synopsis: 

Cheon Joong Myung, the third son of the CEO of the fifth wealthiest corporation, Ji Gyoung Group. And his assistant working under him, Seong Chang Ook.

While Seong Chang Ook tried to kill Cheon Joong Myung and cover it up as an accident,

Seong Chang Ook was accidentally electrocuted along with his boss.

That’s when they find themselves trapped in each other’s bodies…

"You want me to become a playboy Conglomerate the world has never seen before?”

“I’ll be opening the doors to hell if I do this”

Likes: One of the best business management novels done with good research, MC is good boi, jerk original chaebol boss die in early chapters, entertaining side characters