The OS-tan I was thinking of was: XP tan!
She had black hair than went past her shoulders; with a clip in her hair saying XP.
I couldn't tell her height from a distance, but she could probabily be easily taller than me.
Her blue eyes gazed into mine as I saw her trying to desperately cover herself up in embarrsement.
She held her legs together to cover her virgina and her arm to cover her breasts with no luck; which was kinda hard to cover a C cup.
I watched in fasination as my thoughts became reality and it looked so much sexier in reality than in his thoughts, however he didn't think about her going to scream and when I saw her take a deep breath in.. I realised and quickly made a wish.