Kaji Ryuusuke no Gi

Kaji Ryusuke is a second son of a great politician. However, his father and brother both pass away from a car accident. Now, those who supported Ryusuke's father want Ryusuke to carry on the family business as a politician. At first, Ryusuke tries to get out of the responsibility, but he eventually enters an election to become a politician.
The manga chronicles Ryusuke's rise in the world of Japanese politics.