Yesterday Enemy is Still Enemy Today(1995)

series - first aired/released 1995-04-09

Arashi Kohei, inherits a pharmaceutical company from his deceased father. Despite the hard work he was doing, six months before his parent's death, many people are trying to take the company away from him. Soon, Kohei discovers allies but also enemies, among the people he least expected it to be. Will he manage to hold his position in such a brutal world?