Yoru Ma -Ki-

is a Japanese light novel series written by Gakuto Coda, with illustrations by Mikazuki Kakeru. The series began publication on January 10, 2010 by ASCII Media Works under their Dengeki Bunko publishing imprint.

Synopsis
"What is 'Nozomi' that sleeps deep inside you?"

A big cherry tree standing in the schoolyard of an elementary school. This cherry tree kidnaps a child. When Saki was a child, her best friend sank in the petals of cherry blossoms and disappeared in front of her. When the wind blows and the cherry-colored ripples rise, Saki feels a clear danger with the chills. ── Cherry blossom petals are dangerous. And she keeps thinking of her best friend and secretly wishes when she meets the witch.

This is a story spun by a witch wearing a cloak of the night color (Yoriro) of the "Missing" series and a witch, Eiko Toka. And what is the encounter between the two?