S1, E3: The development of the new valve system proceeds smoothly with the help of Gear Ghost, and the only obstacle remaining is the final combustion experiment. Shigeharu Suibara of Teikoku Heavy Industries summons Tsukuda and tells him his company is subject to a credit inquiry. He is told the reason behind this is the acquisition of Gear Ghost. Tonomura is leaving his home on the day of the credit inquiry when his father collapses and requires emergency surgery. With Tonomura absent from the meeting, the Tsukuda Factory members sit crammed in the credit examination office of Teikoku Heavy Industries without the necessary documents. How will they get out of this predicament?