After losing his parents, the young heir Yuuri is left in the care of Lilith, a composed new maid with tan skin and deep purple eyes whose every kindness he reads as a plot against him. Convinced she might be a sorceress slipping potions into his meals, Yuuri shadows her around the estate looking for proof. The running joke is that his suspicion is really a crush he will not admit, and it flusters Lilith as much as it amuses her.