Isshinjou no Tsugou ni yori, Shitsuji Hajimemashita

Overview

“From today, you will be a butler!” Kiyotsugu, head of the Douma clan and a hard-core otaku, decides one day to completely revisit the look of the members of his household. To fulfill his wish. Fujizuka, who had taken of Kiyotsugu since childhood, took on the role of butler, outfit and all. But as Kiyotsugu had his fun dressing up the servants and himself in all sorts of attire, it seems that his actions hide a more serious motivation... Will Fujizuka manage to understand Kiyotsugu's intentions, as he makes many clumsy attempts to express his feelings?

Source: AniList