Here are two uniforms that you might want to grab and keep in the inventory from Peppermint Blue and Sera Korea.
From Left to Right:
Outfit: .::PeppermintBlue::.SailorCollection2009#01[[Black&Gray]] (0L, there's also a grey edition)
Outfit: S4_School Uniform_Female (10 mins lucky chair, sit on the chair for 30 secs to get the gift.)
Have a great night!