No Longer Human is told in the form of notebooks left by one Ōba Yōzō (大庭葉蔵), a troubled man incapable of revealing his true self to others, and who, instead, maintains a facade of hollow jocularity. The work is made up of three chapters, or "memoranda", which chronicle the life of Ōba from his early childhood to his late twenties.

A call from the phone is too striking, but visting the same Cafè almost every day is alright? The Mafia is realy a weird organization. During daylight it was a nice place to meet with friends or have a small break from work. In the evening, nobody would dare to come close to the small Cafè. The reason? It can't be any closer to the Mafia then this. It was the closest house to the sea and also the closest to the port Mafia. The owner of this shop was a couple in their late 40's with their son. It never mattert to the family that thei had to close the shop when the sunlight was faiding, because then the Mafia took action. No, that was normal for them and they still managed to be very happy with it.