Age
16
Birthday
December 15 1977
Natsuno Yuuki (or Natsuno Koide) is one of the main protagonists of Shiki. Originally a city dweller, he reluctantly moved to Sotoba with his parents. His father's surname is Yuuki. However, his parents did not get married and he has his mother's surname. This makes his legal surname "Koide"; not "Yuuki", as some might assume. Natsuno is a calm and highly intelligent individual, and he is often seen studying in his room. At first glance, he comes off as cold, quiet and uncaring, especially towards Megumi. However, he shows throughout the series that he is very caring of those he considers his friends, such as Tooru, Akira and Kaori.

Shiki
Sotobamura is a small village with around 1300 inhabitants. It is a village which is connected to not even a single highway. An isolated village in which old customs, such as the burial of the dead, are still practiced. One day, the corpses of 3 persons are found. Although Ozaki Toshio, the village's lone doctor, feels uncertain, he treats the deaths as normal occurrences. However, in the days following, the villagers die one after the other. Is this mere coincidence, an epidemic, or something else entirely?