Shouji Hachisuka

Naomi Shimizu is a young career woman working for Enrico Dandolo, an Italian fashion house. That is until one day the company declares bankruptcy. Accustomed to living in luxury she tries to make a run for it with the last remaining company asset, a red Alpha Romeo sports car. Unfortunately she recklessly collides with an bicycle messenger. Lacking any funds to pay for a settlement, she end up having to work as a bicycle messenger.

Five descendants of the people showered with Bio Particles by Bio Robots five centuries in the past have become Biomen. They transform with the Bio Brace and fight using their Super Electronic Brains on their masks. Their Bioswords are equipped with sword and gun modes.