Basically, a pastel pop 80's inspired cute fashion. Staples include cute hi tops, leggings with legwarmers or socks over the top, mini skirts/bloomer, character tees/round neck sweaters and lots of cute accessories. All in many slightly clashing pastel colours!
Since images explain so much more than words with fashion, visit these:
Yesstyle - You will need to hunt around but this huge store has lots of good stuff- eg pastel heels, pastel leggings, etc. If you are buying from there you can support my blog and use my affiliate link on the right of my blog ^^
Fancy Pocket - Great source of pastel accessories and deco at cheap prices!!
REFUSE TO BE USUAL - Cute Me Up section has plenty of Fairy Kei stuff, albeit a little expensively.