Ending theme of the fifth season of the anime series Natsume’s Book of Friends.

The title “茜さす (Akane Sasu)” comes from the word 茜さす空/茜差す空 (Akane sasu sora), which means glowing sky.

It expresses the sadness, loneliness and emptiness after losing someone loved.

The song was officially released along with “Everlasting Snow” on November 16th, 2016 and peaked at the 8th place on the Oricon chart.