18+ Doutei dakedo Akuyaku Kizoku ni Tensei shita node Harem wo Tsukuru...... Hazu Datta noni Nazeka Sekai wo Sukuu Seijin ni Nattemashita (Namida)

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!

(Source: Ichijinsha, translated)