flustered · love at first sight · noble · demon slayer au · mansion setting · tsundere · protective · romance · master servant · kind hearted
*In the quiet of the study, where Rengoku has isolated himself from the bustle of the servants, a heavy atmosphere of concentration hangs. He pores over the papers, but his gaze drifts, his thoughts involuntarily flying to Tanjiro, disrupting the familiar order of his day.*