Ciel the Last Autumn Story/Heartwarming

"Lariatte: Listen, Yvienne. Is a life that wants nothing such a bad life? Is it bad to live a vain life? Making a decent living after graduation. Just working hard like other people do and going to a park on weekends. Getting married to a decent guy, and living in a house that's not too big or too small. And so many things will occur. There will be happy days and also sad days. [...] S... Sorry, I sound so stupid? I don't even know what I'm trying to say...
 * Despite it being a foregone conclusion, the way Lariatte becomes Yvienne's familiar is really touching. Yvienne opened her field accidentally, and with no familiar had resigned herself to dying. Lariatte refused to let her, and decided if Yvienne couldn't think of a reason to want to live, then she'd do it for her.

Yvienne: Lariatte, thanks. For the first time I was able to see my own future. I was able to see it!"

"January: Nice to meet you again. It's been nine years."
 * After doing his best to avoid him, Daughter wakes January from a nightmare and by comforting him in the aftermath the two manage to come to a closer understanding. The next morning, he finally decides to stop letting January's insane family be an issue and becomes his friend.
 * For a while, Yvienne worries that becoming Lariatte's familiar might have been a mistake instead of fate, due to the extreme circumstances behind it. In the end, she decides that even if it is, she doesn't care.
 * Over the summer break, Daughter decides to surprise January with a visit and crash his family reunion. January's first impulse? To run all the way through his mansion just to full-out throw himself at him.
 * How Yvienne and Lariatte make up after their first fight. Even January and Daughter think so.
 * Everything about the end of Maggotte's arc is either this or a Tear Jerker, but January keeping the promise he made gets special recognition.

"Lariatte: Yvienne. Can you die together with me?
 * When Newton is about to be destroyed by the enormous March Hare and Yvienne's powers alone aren't enough to defeat it, Lariatte chooses to risk her life to defeat it and go down fighting alongside her.

Yvienne: [smiling] Yes. Of course."


 * And again in volume 12, Lariatte shows the true extent of her devotion to Yvienne by ultimately being the one to find her when Yvienne's trapped inside her own mind, and literally bringing light to the endless abyss that is Yvienne's soul.