At first this one looks like a basic hentai/sex fantasy manga, until you realize that both the male and female leads have been unable to have sex for years because of traumas (different for each of them) suffered when they were younger – the man at the hands of a teacher and the girl at the hands of a relative. Now these two have found each other and are attracted to each other, but because of their pasts both have trouble finding a way to consummate the relationship.

(Source: MangaUpdates)