Even Though I Was a Virgin, I Reincarnated as a Villainous Noble, so I Was Supposed to Build a Harem... but Somehow I Ended up Becoming a Saint Who Saved the World (Sob)

In his previous life, he died a virgin. In another world, he is reborn as Grave, the villainous noble of an eroge. Determined to build a harem, he soon remembers that Grave is destined to be killed just a few years later. Can he escape his doomed fate and create the harem of his dreams? A fantasy packed with action, fanservice, and harem antics begins!