As first seen on blog "Willa's Cherry Bomb" here: OOTD: Back In The Day + Ankündigung!
She is wearing tights similar here: H&M Fleece Tights
Opaque tights with soft fleece lining and elasticized waistband.
Junya Watanabe Pink Block-colour Tights
Express Swiss Dot Full Tights
Nasty Gal Sheer Genius High-Waisted Striped Tights