I've been reading through this a bunch of times and kept thinking something wrongs then a comment on Fanfiction made me realise what it was. The story has to be focused on Tsuna's point of view! So I've fixed up some chapters.
Tsuna's P.O.V.
"You useless child!" Papa smacks me across the face sending me flying. "Do you know how humiliating it is to have a no-good child?!" Papa began to kick and punch me so I curled up into a ball, begging for mercy.
"I'm sorry, I'm sorry... please, stop... it hurts..." I beg which makes Papa stop, but my twin doesn't allow him to.
"Daddy, don't! She was so mean to me!" Tsuru wailed, letting out crocodile tears. Mama immediately went to embrace her youngest daughter and agreed.
"Anata, you can't let it get away with being mean to our precious baby girl!" Mama cried, outraged as she tried to calm Tsuru down. Mama has never embraced me like she has for Tsuru.
"You're right," Papa sneered before yanking me up by my hair. "It needs to learn it's lesson," he dragged me to the basement door before shoving me down. Watching in glee at how I tumbled down the steps, crying out in pain.
"You'll stay down here without dinner or a blanket. This will teach you to know your place," Papa slammed the door shut, leaving the me in the dusty, old, dimly lit room.
I just laid there knowing that, no matter how much I screamed or cried, Mama and Papa would never let me out. I curled up into a ball to protect myself from the bitter cold.
It wasn't so bad, after all, this is my bedroom. I stay here every night, I didn't deserve a room, a proper bed, shower or clothes. I always got Tsuru's afters, anything she didn't want I got. Unfortunately, she knows that which is why she destroys it to the point of being unusable.
The basement was quite big, there was a small bookcase filled with damaged and torn picture books, my bed was a bunch of fabrics on the floor with a shawl for a blanket. I couldn't go upstairs for a shower so my parents left me a bucket of cold water for me to wash myself with a dish towel. I was allowed upstairs to pick up my meals 3 times a day though I wasn't allowed to eat up there.
It's fine though because I know I deserve this. I'm a disgrace to the family. Dame-Tsuna was what I was called by everyone. I was slow in my development, didn't start walking until 18 months and I didn't say my first word until I was 2 years old. I tripped over thin air, I had only one friend who I met at school, but barely saw since he was older and was considered to be a loser by everyone in my elementary school. (1)
'Kyo-chan probably doesn't remember me,' I lament. I wanted to believe he would, but I'm a loser. A herbivore he said, so he wouldn't like me.
'I'm sorry for existing Mama, Papa, Tsuru. I just want you to be happy but please don't abandon me. I'll be a good girl. I love you all,' I prayed before falling asleep on the cold fabrics, all alone, while my family were upstairs having fun at the dinner table.
(1) Tsuna is about 7 years old nearing 8 years.