My Nee-chan

I finally found my Nee-chan, after 10 years. She just suddenly disappeared but I found her now and it won't happen again! I refuse to leave her. Sorry if it's a bad summary, this is my first fanfiction and therefore my first summary. Please read and review! I don't mind criticism but please try to keep it polite. I have abosolutely no idea about couples yet. Thank you!