I'm not very good with summaries, so all I can say is to read it to find out what it's all about. :P Black Butler belongs to Yana Toboso.

What if your boyfriend was a boy from Black Butler/Kuroshitsuji?! Ciel, Sebastian, Alois, Claude, Finny, Bard, and Undertaker. See how you meet, first date, first kiss, fights, perverts, and many other exciting things happen, its never a dull moment in the world of Black Butler.

𝒕𝒐𝒐 𝒎𝒖𝒄𝒉, 𝒕𝒐𝒐 𝒍𝒊𝒕𝒕𝒍𝒆, 𝒕𝒐𝒐 𝒔𝒐𝒐𝒏, 𝒕𝒐𝒐 𝒍𝒂𝒕𝒆 ↳ in which y/n finally gets a second chance in life, with a butler by her side. warning : 𝒕𝒉𝒊𝒔 𝒇𝒂𝒏𝒇𝒊𝒄𝒕𝒊𝒐𝒏 𝒊𝒔 𝒂 𝒄𝒓𝒐𝒔𝒔𝒐𝒗𝒆𝒓 𝒃𝒆𝒕𝒘𝒆𝒆𝒏 𝒈𝒆𝒏𝒔𝒉𝒊𝒏 𝒊𝒎𝒑𝒂𝒄𝒕 𝒂𝒏𝒅 𝒃𝒍𝒂𝒄𝒌 𝒃𝒖𝒕𝒍𝒆𝒓! ranking #2 genshinimpact (01/15/2021) #5 kuroshitsuji (01/15/2021) #1 chongyun (03/22/2021)

A story of a human-like doll and her owner Undertaker.

I don't own Black Butler :)) You are a half-angel, half-demon... For demons, their hearts don't beat until they pass their soulmate, they don't feel pleasure, they don't feel that many emotions. What happens when Sebastian comes across his soulmate...you. Will you accept or not? This is not modern^^