Cute Anime Girl

Hello everyone! at first I would like to wish everyone Merry Christmas and thanks all those who are going to read my this ridiculous lista of mysterious relationships.
It's been 7 months since I've started to watch Anime and after watching 22 Anime series I found some mysterious relationships between two characters in various animes. I don't know if te all feel the same way about them but still lets figure it out okay? XD!!
So here is my list~

•Undertaker & Claudia Phantomhive from Kuroshitsuji~
To me it's most mysterious relation I've ever found in the anime. Also in manga it never explains...

As I've detto before I think there are 3 definitions to the word underrated. Today I will be talking about gems but this will be a three-part since the Anime all have different tones and purposes.

Definition 3: no one has heard of it but you, making it a hidden gem that unfortunately leaves its future survival to small groups of dedicated advocates but più likely than not will be forgotten with the sands of time.

Of course this is slightly exaggerated since I'm sure most of te will be able to point out one o two te recognize o even watched o not even have a same definition of Mature as...