A/N: Song Title: Cherry Blossoms-Jia Peng Fang

...

Present Day:

"Have you read the book I gave you?" asked Thomas to William after he got home after school. William was surprised to find him in front of the door and asking him about an old book which is very much very sensitive to touch already.

"I... Haven't read it yet," he honestly told his instructor and guardian.

"The book is your mother's diary and also, it was the story of your parents. You do have to read it and your clan requires you to do so. They have been protecting that book for years until they pass it on to you," he told him.

"I understand but..." he looked at him, "How'd you know it's the story of my parents?"

"The revelation I told you is all written in that book. Your mother knows English fluently like you are now and she had written her diary in English and not in your local tongue. You have to read her diary with even a few pages of it for now I don't need to keep explaining to you everything but as I can see, everything that happened to them has a huge impact to the present after you have met Lady Juliet."

William understood him and he quickly went to his room. He opened the door and entered his room slowly. While he was closing the door after he had already entered, he looked at his room and found that his room is actually very much similar from his old room back in Japan. He sat in front of his black piano and sat there since the book which Thomas was telling him is on his piano. That is where he kept the book for a while. He took the book between his hands and stood up from his seat and sat on his bed. He, then carefully opened the very old book.
...

Saki Arima's Diary

I have become weaker and weaker as my son, Kousei get older. As he grows up, my body slowly leaves him. My anxiety and fear of death grow too. I always feel sad by myself that by anytime, my body would leave him and I'd be invisible to him.

I do know how much I regret causing him so much pain. I have even prevented him from having many friends. I just limited it with two and that is enough. I didn't even let him be friends with Miyazawa Rei who was once very close to me but no matter how many times my husband visits me or asks me to go abroad to get treatment, I just can't go anymore.

Will they even know each other soon?

I even tell her to hide whenever my son visits me. It pains me a lot to see forcing himself to be at the top spot. What could I do? I don't want to change myself all of a sudden just because I am sick. He always says that he'll get the top spot as if it'll cure me but I lose myself always when we practice. I know I was abusing him already.

Whenever I get outside of the hospital, I do train him a lot but my sickness overrides my feelings most of the time and it pains me all the time whenever my disease attacks me. I do believe, in front of everyone, I am creating a human metronome. It's my fault. The people call him a robot as he can totally play by the score. 

Whenever I hear people calling him 'Human Metronome', at first
I became happy but it slowly became an insult to my son.

For me, I have stolen from him how I was brought up when I began playing the piano. Due to my deteriorating body, I have no time to tell him to enjoy playing the piano. I treated him as if he's my clay, forcing to mold him by how I instruct him to.  

Forgive me... Forgive me... Takahiko...

We left our families to be happy together but look at us now! We haven't done our roles, right! We should have been the cure but we lit the flame stronger.

Us, being together... Are we not really for each other? Even God separated us!

Taka... Taka!

When I die, take him back with you. Most of all, tell him to forget me.

Tell my family to accept him.

Please, I know I'm giving you a heavy burden on your shoulders but even you are alone, please unite our families. Unite our families, I'm begging you!
...

Letter To My Son

Son, if you are reading this now, it means you're living as William Arima already and not as Kousei. Forgive me for abusing you and not telling you anything about our entire family structure. 

Even though I don't know if you'll ever read this, I still decided to write this after all as I am more assured that when I'm gone, your father will take you away in your comfort zone.

I am warning you now, if you are now William, your life is not as easy like you had before. Giving up music will be one thing you'll need to do to stay in the society where you stand now.

You can never go back in being Arima Kousei anymore even you get caught by your closest friends.

If your father haven't done what I was asking, then you don't need to do what I asked him. Do your own way of living.

I know you may be thinking I am asking you too much but I am not telling you to kill them. Be strong and take yourself up. Do not let the two families use you.

Don't trust them that easily. Observe both families and all of those around you.

You are my Spring's Symphony.

I know you'll understand what I meant.

Forgive me. For now, my Spring's Symphony has a sad melody. 

You can change it soon, right?

Be strong, son.

Forgive me, son. I can't be with you longer. I might die without seeing you succeed but you must never forget, I am always with you. You know it well, son. 

You do know you're the key of merging the two families. 

Live on, son. Forget all of your despair. That's my only wish as your mother. 

....

After reading the letter, Kaori and Mr. Thomas heard Kousei's painful screams and tears from his room. Both quickly went inside his room and saw that he was crying after reading the old book his mother had written on. 

Tears barged in his own eyes. Forgetting all of his despair since he had lost her would be like forgetting his own mother and he doesn't want that but he soon knew it himself that while he keeps leaning on his past, he could never be William Arima all together and he would stay as Arima Kousei. He kept screaming painfully and bitterly in his own room saying why his mother needed to die in front of his own mirror which he did punch on when Mr. Thomas and Kaori found him. 

Both saw that both of his hands were all bleeding after punching the walls in his room. When Mr. Thomas came to face him, William shouted at him, "YOU SHOULD HAVE NEVER LET ME READ MY MOTHER'S DIARY! I COULD HAVE STAYED IGNORANT ABOUT MY PARENTS' PAST!!!!"

When he said that, Kaori slapped him and told him, "Your mother is a wonderful woman. What's wrong with forgetting your past hurts so you can go further away from that? Are you afraid of being William completely? You're still Kousei, aren't you? You haven't truly killed him yet?"

William held her shoulders and angrily told her, "What's wrong with being half and half? I'm still Kousei? Don't joke around Juliet! There was never Arima Kousei. I have always known I am William Arima. I know my true name from the beginning! Kousei is just a name my mother had given me but everything about me, I am William Arima and I have longed to know who my relatives are but I didn't know that when they finally opened up to me, my life would be as complicated that my mother's family would want me killed to prevent them from joining hands together. I am their key, Juliet. As a key, I have the responsibility to open up a new door. Will you be able to help me?"

Kaori was so surprised by what he had said. Mr. Thomas smiled at them while his tears fall down silently which he quickly dried up. 

...

Everyone has fallen teardrops...

But every hardship stops...

A rainbow would soon come up,

As a key....

Will you be able to end it, yourself?

Forgive me, my son... my husband...

For the lie I have caused you...

But I have to stay hidden...

You'll never know...

I am always watching both of you.

...

A/N: Thank you for those who are still reading this! I have been busy watching some shows and yeah... a sad encounter happened to me while watching some Korean Dramas. My father destroyed my tablet, luckily I still have my laptop with me. And yeah, I want to recommend the shows I watched as my materials in writing this new chapter since I had some Writer's Block.

I recommend you to watch this shows:

1. Bridal Mask

2. Yong Pal

3. Tomorrow's Cantabile

4. Bread, Love and Dreams.

I know you'd love them! 

Also, yes... if you understood the last part of my fanfic, I do think I don't need to put whose POV it is. I did not really write who was talking in that POV since I want you to think who that person is.

Well then, I'm off! Stay with me till the end, ok?