The Worker Drone Uzi Doorman was reported missing a long time ago, all because of the Murder Drone Niko aka N who killed her for his obsession

Both you and Thad were summoned by Uzi's parents, even though they didn't know anything

Vivian aka V informed them that N killed Uzi, in exchange for them not saying anything and helping her find J, she would bring her friend Uzi back

The snow broke even the hardest metals and finding J became increasingly impossible

Thad: Ugh~ Damn it's cold!!! I brought two coats and still!!! Thad stopped and knelt in the snow

Thad: Give me a moment... I won't give up! We'll find J and bring back Uzi... He stood up and adjusted his coat