余よ光こう

noun

afterglow; lingering light

Refers to the light that remains after sunset or after a light source has gone, often with a poetic or literary feel.

• 西にしの空そらに余よ光こうが残のこっている。

  An afterglow lingers in the western sky.

• 彼かれは余よ光こうの中なかで本