If you're looking for anime similar to Hiiro no Kakera Taizen: Totsugeki! Tonari no Ikemens, you might like these titles.
Disguised as a man, Chizuru Yukimura has come to Kyoto searching for her missing father, a doctor who developed a magical elixir that increases the drinker's speed, strength and healing abilities. Instead of her father, however, she stumbles across a battle between the Shinsengumi and the Furies, evil vampire-like creatures of their own making.
If you like Hakuouki or Hiiro no Kakera Taizen, you would like the other because both anime features a lead female that hides a secret within herself and who is amidst in a reverse harem surrounded by many attractive men. Both titles also demonstrate supernatural elements and samurai appeal.