About the first story in this book:
A badminton player who transmigrated by suicide decides to learn how to make inflatable dolls, planning to open an adult toy shop and make a living once he has made ten thousand of them. At school, his desk mate meets a girl who also plays badminton and wants to visit Sweden one day...
"Maxwell's demon" was first proposed by Maxwell. If there were a nimble, molecular-scale demon able to control two doors, letting fast-moving molecules through one side and slow-moving molecules through the other, one side would grow hotter while the other grew colder, effectively creating a perpetual motion machine of the second kind. It would be like a ship sailing across the sea, using this sort of technology to absorb heat from the seawater as its power source while expelling ice. In reality, this violates the principle of increasing entropy.
PS: This story features Attack on Titan, The Garden of Sinners, White Album, Lightly Fluttering, A Certain Magical Index, and Sword Art Online. They are not listed in order of appearance.
