“That is why this is the beginning of the end. About how a human named Koyomi Araragi. About how myself, Koyomi Araragi, is going to end and begin.”
-Koyomi Araragi, Tsukimonogatari
Koyomi Araragi says that Tsukimonogatari, the story of Yotsugi Ononoki, marks the beginning of his end. However, he only speaks of the end that he is aware of. There are a variety of ends for different facets of Koyomi. The most interesting end begins not with Ononoki, but with Nadeko Sengoku.