Purity; innocence—having a clean, naive, or unsullied character, often used about a person's image.
彼女は清純なイメージでアイドルとして売り出された。
She was promoted as an idol with an image of purity.
小説の主人公は清純さを失わない人物だ。
The novel's protagonist is a person who does not lose their innocence.
清純さを売りにする商品広告が多い。
There are many advertisements that market products by selling an image of purity.