The Ivory blouse has not been photographed separately. White garment photographs show the style; the pale fabric swatch is Yilia’s colour reference.
A very sheer chiffon layering blouse with a gathered neckline, a soft chest panel and ruffles at the hem. Tiered sleeve flounces and gathered cuffs give the sleeves a light, floating shape.
Yilia explicitly describes the White fabric as very sheer. Blouse only; the dress and accessories in styled photographs are not included. The source provides an Ivory fabric swatch, but no finished Ivory blouse photograph.
This works best where a JSK covers the body and leaves the airy sleeves visible. The fabric is deliberately transparent, so choose an opaque layer beneath areas you want covered.