私は21歳の弟がいます。Olivierと言います。

I have a 21 year-old younger brother called Olivier. He doesn’t study japanese or english though

Big families are in, eh?
I have an older brother who I used to fight with everyday and a baby sister whose diapers I used to change. She’s six years younger than me and I feel more like her mother than her big sister. I still care about her the most, to be honest. Whenever I go visit my family I give her some allowance and babysit her kids so that she can take a break from her busy life.

I hated having siblings when I was younger, and used to wish I were an only child. But now I really appreciate having them, especially because I have three nieces and a nephew who are so cute!!!!

Sachiko

I have a little sister who lives in London. She’s 18. Why can’t little sisters be all sweet and lovable like you see in anime.

私には１８歳の妹がいます。なんで現実の妹はアニメの妹みたいにかわいくて優しくないのだろう？　（しょんぼり）

Daikiさん,
So, there are three children in your family? Me too
I have a younger brother and a younger sister.