Warm Up in a Kotatsu General Frost of the Warring States.Winter soon arrives, and Nobunaga is moved indoors as a result. Thankful for the inventions of the heater, air conditioner and kotatsu, Nobunaga imagines what would've happened if he had them in the past, but realized it would cause everyone to become too lazy to work. He notes their old way around winters was through alcohol, but his troops would often drink too much and there were times they'd end up being too drunk to properly fight. The next day, Seira, Ai, Tomo and Mitsu all visit to cook some sweet potatoes outdoors, but Nobunaga's fear of fire causes him to panic until he's finally fed some sweet potatoes...