The collection, The Great Feminine Appropriation, reinterprets menswear by blending traditional masculine elements with feminine elegance, drawing inspiration from the 18th-century 'Great Masculine Renunciation,' when men moved away from ornate fashion. Onsirin juxtaposes structured menswear features—such as suits, lapels, and shoulder pads—with the hyper-feminine aesthetics of Old Hollywood and couture draping techniques from the 1950s and 60s.

Consisting of eight looks—four womenswear and four menswear—the collection challenges gender norms, transforming menswear into glamorous, feminine pieces while pushing the boundaries of both styles.

In the campaign A Rose by Any Other Name…, featuring garments from The Great Feminine Appropriation, unfiltered moments between lovers are captured against intimate domestic settings, emphasizing the beauty of everyday life—quiet mornings, shared meals, and tender gestures. Produced for Pride Month in June 2024, the campaign is ONSIRIN's heartfelt love letter to the LGBTQ+ community, offering a raw portrayal of love that highlights profound connections across all gender identities and sexual orientations.