Shibou Flag wa Chikara de Heshiore! Eroge no Akuyaku ni Tensei Shita node, Gensaku Chishiki de Musou Shiteitara Harem ni Natteimashita

I’ve been reincarnated as the villain in a game I mastered!? Use knowledge of the original story to dominate and forge new routes! I reincarnated into the bishoujo game Gakuen Kagurazaka that I played alot—as the villainous noble, Titan, who has zero talent with a sword and can’t use any skills....

Source: MyAnimeList