The Winter Dog Flies into the Fire

After seeing her in a dream, Kazuhito recalls his younger sister Madoka Harumi. His nostalgia is cut short when Shinobu Akiyama's editor Suzuna Hiiragi appears, a massive masochist with huge breasts prone to fantasizing. What's worse, Natsuno is in a slump?! As they discuss how to get over her slump, the subject of a mysterious slasher case arises. However, lurking in the shadows of the incident are glimpses of Shinobu Akiyama's book and Madoka...