Muteki Keiji: Daidageki ~Shijou Saidai no Hanzai~

The hero of the game, Daidageki, is a police agent known for his hot temper and fighting skills. He is working together with his lovely partner, Risa, fighting crime in Bunkyou-ku, a district in the heart of Tokyo. An encounter with a yakuza gang leads to the discovery of plutonium being smuggles into the country. very soon Daidageki and Lisa find themselves fighting for their lives, with no one to protect them but themselves...

[From Moby Games]