Akuma Taiko to Nekomata Majo (Links Romance)

[Machine Translation] This is the demon world where the demon tribe lives. Hilda, a black cat tribe member who served the demon aristocracy as a butler, lost her master, the duke, and in order to follow in his footsteps, she tasted the fruit of the heavenly realm. However, she did not get the desired result and only lost her black color, the sign of a demon. Hilda retreated to the frontier and eventually became known as the silver-haired witch. Then, Zeke, a senior demon who had promised the adult Hilda since she was a child that he would take Hilda if she became greater than the duke, appears to take Hilda for his own as the Great Demon King.

ここは、魔族が暮らす悪魔界。黒猫族で執事として悪魔貴族に仕えていたヒルダは主である公爵を亡くし、あとを追うために天界の実を口にする。しかし望んだ結果は得られず、悪魔の証でもある黒色が抜けてしまっただけ。ヒルダは辺境へと引っ込み、やがて銀髪の魔女と呼ばれるようになってしまった。そんな中、「公爵より偉くなったらヒルダを手に入れる」と幼き頃から大人のヒルダに宣言し、約束を交わしていた上級悪魔・ジークが大魔王となりヒルダを自分のものにするために現れて―。