Sarouel..If you ever see this again, Ne-Net is a Japanese brand. There may be stores in Hong Kong, not really sure though..But I'm sure it isn't sold in the US, and not sure about Europe, but I doubt it. Its a FAIRLY new brand.

You can go to www.hmr.jp (its in mostly Japanese), and they have an online store. Click "Ne-Net", and you can see what they currently offer.
I'm pretty sure those pants are from an older season. SOMETIMES ebay has
Ne-Net, but very rarely. I know if you have a mixi or Japanese yahoo
auction account, you may also try there...But as far as getting it
outside of Japan, its gonna be pretty difficult. Not trying to spam up the comments, just wanting to help people know more about how to locate
these great items that are being featured. I know personally that this
exact Ne-Net t-shirt design is as old as at least 2008, because that's
when I bought it.