Ciel's POV
We arrived at the mansion and were greeted by the other servants. Sebastian was interrogating Mey-Rim and Bardroy on what had been happening around the place while we had been gone. I waited for someone to open the door and (y/n) grabbed our luggage and paced through the door and placed everything in the doorway. She said nothing and her wolf features were all completely hidden. She climbed the stairs and came back down a few minutes later in her Phantomhive maid clothing. I caught sight of her face while she polished the walls of my study. The only emotion showing was empty sadness. She never spoke a word until she finished, "all done, Master." She bowed her head before leaving the room.
Finnian's POV
I missed my friend soo much while she was away with the Master. So once Sebastian had finished the examination and lecture, I rushed to find (y/n). My first thought was the bluebell field. But I found not even a trace. Nothing in the garden or kitchen though. Surely she couldn't be too hard to find? I thought. So I ran into around the halls, checking all the rooms, even the masters and Sebastian's. I thought to go and check if Master Ciel had seen her, I knew for a fact that she was dusting his study earlier!
But I saw that her rooms door was open, I saw her sat, unseeing in the large window that overlooked a neighboring woods, staring into nothing.
"(Y/n)?" I said smiling and I ran to hug her, "I'm so happy your back! I missed you! We all missed you ever so much!"
"Hi, Finny." She mumbled, patting my head gently. Odd, she would usually laugh and hug me back. I wonder if she was feeling ok.
"(Y/n)? Are you feeling ok?" I asked, looking up at her with my large, moss green eyes. I was really worried about her!
"*sigh* I guess so." She sighed. Something was defiantly up. I shall ask her if she wants to help with the garden and groom Pluto! That will almost defiantly cheer her up again! (Y/n) ever so loves working in the garden!
"I have an idea! Why don't you help me in the garden! And then we could groom Pluto! It will be fun!" I cheered, leaping up and smiling.
"I'm sorry, dear Finny but if it's all the same; I think I might just polish the main hall today. I'm afraid I don't have the energy today." And with that, (y/n) trudged away.
Poor (y/n)! I hope she feels better soon. Maybe I could get the other servants to help me persuade the Young Master to let us throw her a surprise party! It's nearly her birthday anyway!
**********
"Mey-Rin! Bard! We need to make the Master to allow to throw (y/n) a party! It's almost her 15th birthday! And she doesn't seem quite the same." I said seriously when I found them in the kitchen.
"That sounds like good fun. I could cook and extra special meal in her honour." Bard said, "Count me in! Let's do this!"
"A surprise party is just what we need to celebrate, yes it is!" Mey-Rin replied.
We stood in a circle and put our hands in the centre for our secret handshake, we all whispered, "hip, hip, hooray!" And rushed to the masters study.
Sebastian's POV
I was stood by my Master as he drank his Earl Grey tea when all 3 of those idiots ran into the room. And Tanaka matched in just behind them, the only other servant that wasn't a complete and utter imbecile.
"Master! We would like to give our dear friend and fellow servant a surprise birthday party!" They all shouted very seriously. I had almost forgotten that it was to be her birthday in 2 weeks! To my surprise, the Young Lord just sipped his tea and said, "Alright then. But prepare it after your daily chores, oh and try not to bother me. If it is absolutely necessary though, then just talk to Sebastian. I can't be bothered to deal with your petty problems, I have work to do."
"Thank you Young Master." They chanted before bowing and leaving the room giggling like a bunch of little girls.
I sighed and brought my hand to my forehead in annoyance. "What's the matter Sebastian? Do you not wish to celebrate your sisters birthday?" The Master smiled.
I replied with, "of course I do,
Master. I just fear I may have to fix everything in the nick of time again.
And with all due respect, you have once more assigned unnecessary work to my timetable. I must now take my leave and prepare your evening meal. Please excuse me, Master." I bowed my head, hand on heart and walked out of the room.
I pulled out my pocket watch: 4:58pm. That gives me 2 hours and 2 minutes until dinner must be ready. That should be plenty of time, if I hurry, I might have time to iron the Earl's nightwear before i announce the meal.

Heyo! Sorry that this chapter is a little shorter than usual. but I couldn't really think of much to put in this chapter. I won't update again until (at the earliest) Sunday. This is so y'all have plenty of time to write in the comments what/who you would like to see at your birthday party. Keep in mind that this is set in the 19th century. If no ideas are put forwards then I will postpone the update for longer until I have at least 2 ideas. Thank you for your valuable time,
Love ya! Xxx