Tosei Burai.

Ryoji Minami, an elite trading company man, falls in love with Minako Kano, the daughter of the fifth president of the Kanto Kano family, overcomes obstacles, and has a wedding. A sudden misfortune befell Ryoji. On the day of the wedding, his father and daughter were killed by a bomb planted in a package. In anger and sadness with nowhere to go, Ryoji vows to take revenge on the bomber, and as the sixth head of the Kano family, confronts the Kyoei Alliance.