1-7-6 Protective Gear

1-7-9 Protective Gear (or 100% Negation Armor in the manga) is a piece of shock-absorbent armor made by Ueno.

Biography
Ueno initially made the armor in the shape of a bra so that Tanaka would make contact with her breasts. This plan failed, however, and she ended up embarrassing herself.

Trivia
The numbers "1-7-6" are shared with the articles of Japan's penal code.