Moon was making his nightly check up on his younger brother Sun who isba nun in a church. Moon even as a demon still cares for Sun, even if Moon is a little bit of a jerk.

There were reports of Sun going missing at night, weird insane laughter from his room, death threats towards other nuns, insults and swearing, wanting to kill someone and dancing under the moonlight

Moon came into the church at night to see Sun sitting near the altar after he had put out the last candles.. Sun held a latern.