Clean
Cleanliness
noun, な adjective
Something so pure it's pure twice must be really clean! Cleanliness is next to pure...liness, after all. I'm sure that's how the saying goes.
This is a jukugo word, which usually means on'yomi readings from the kanji. If you know the readings of your kanji you'll know how to read this as well.
実際には清潔だけど、見た目は汚らしくてちょっと影がある男の人がタイプです。
My type is a guy who is actually clean but looks dirty and sketchy.