From Hyper Parfait:

“Kouichi, Marry Me!” That is the wish of Rinko, the descendant of a pure blooded witch family. The customs of her family forbids the matrimony between a witch and a human, however Rinko refuses to abide by that tradition since she fears witchcraft.

Instead of resorting to violent measures, the elder of the family agrees to let the “cupid” do its work. The cupid, Rui, informs Rinko that in order for both sides of this conflict to come to an agreement, Rinko must meet the groom candidates that the elder prepared for her, or else she will lose everything, including her beloved, Kouichi.

For Kouichi’s sake, Rinko, the unwilling witch, agrees to this and begins to face a long line of groom candidates that await her!