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.

A juvenile delinquent code-named Saki Asamiya is taken in by the government and forced to fight crime to redeem her actions. She is sent to various high schools to infiltrate and neutralize gangs and other forms of crime as a police officer using her metal yo-yo badge as a weapon.

Bioman must rescue two boys who possess an ancient treasure map that leads to Biobase, making them targeted by Gear.

Based on the comic book by Tatsuo Kanai

Yoshida is a young man working part-time at a convenience store. As he is about to leave after finishing his shift, Taniguchi, a girl who works with him, calls out to him, saying, "I have a favor to ask of you, Yoshida." Her request is, "I want you to invite a customer who often comes to the store to buy condoms to a group date." Yoshida does as he is told, but the customer becomes suspicious of the sudden turn of events and leaves. Meanwhile, Yoshida continues to live with his ex-girlfriend, leading a messy life. The two begin talking about each other in Yoshida's room, but they can't understand each other at all. Before they know it, they end up in bed...