Mostly Monochrome Monday #382

What distinct day from night? What is the edge of the day or the night? What moves us to separate day from night? Nobody cares?

昼と夜を区別するものは何か? 昼と夜の境界は何か? 昼と夜を区別する動機は何か? 誰も気にしないのか?

A Part of Mostly Monochrome Monday