If you're looking for manga similar to Aku no Musume, you might like these titles.
This is the (imaginary) beginning story of the crazy popular Vocaloid Character GUMI!! By some freak incident, the now cyborg school girl has her eyes set on her idol debut as "Gumi" under the mysterious organization, "Intane Group"!?
What do you do when you have lost everything? Lloyd Lowell has found his answer. In Leon City, people are drawn to the torture of tower, Torcia Tower. There, it is rumored, lies treasures which can bring you fortune, fame and, most importantly—eternal life. However, nothing goes as planned when Lloyd enters the tower...
Rin and Len are older sister and younger brother, siblings in a samurai family that rules in the land of Musashi. They lived there happily with their uncle, the current clan leader. Len has started to feel guilty about Rin's wooing. Then, one day, they fnd out that there have been talks with the land of Owari about Len taking part in a political marriage. Rin is against losing the man she loves, while Len accepts reality. The name of the girl who holds their fates in her hand is... Miku.