Now, where was I? Oh yes...
Kuroshitsuji season I ended with Sebastian in the process of devouring Ciel's soul (http://quillicious.blogspot.com/2010/10/anime-review-kuroshitsuji-black-butler.html).
|Spoiler alert! I actually do not like to write the endings during review. However, I find the ending of this series as the best part of the entire story so I am going to write it down|
Kuroshitsuji season II opens with Sebastian entering Alois Trancy's maison to steal a ring that holds Ciel's soul. However, upon returning Ciel's soul into his body, Sebastian realized that Ciel's memory of the previous events is missing. Therefore, he does not realize that he is dead and that his contract with Sebastian has ended.

Claude is a perfectionist demon butler and is not as laid back as Sebastian. He stole Ciel's soul before being devoured. He wears eyeglasses and can take the shape of a spider, He has four demons followers: Hanna the maid and the triplets demon servants - Thompson (his fringe is swept to the right), Timber (his fringe falls directly to the center) and Canterbury (his fringe that is swept to the left). In the middle of the series, he becames entranced with Ciel's soul and determines to keep it for himself and compete with Sebastian to claim it. Alois becomes jealous and confessed his love for Claude. Upon doing so, Claude murdered him and kept Alois' soul in a ring.
Claude fused Ciel's and Alois' soul and make Ciel deny Sebastian. Hanna, the demon maid, manages to make Alois take over Ciel's body and form a contract with both Ciel and Alois. It turns out that she was the demon who devoured Luca's soul and since she was taken by Luca's goodness she becomes Claude's followers to protect Alois. In the end, Alois makes Sebastian and Claude to fight each other. Sebastian wins and murder Claude. Alois' contract with Hanna ended and Alois died. Hanna dumps Ciel's body into the ocean and die with Claude to join Alois. Sebastian jumped into the ocean to save Ciel.
So as I mentioned earlier, the best part of this season is the ending. I somewhat think that this is the perfect ending.