Goat-chan's bikini (by Enarane)

Civitai 機動戦士Vガンダム ネネカ隊ビキニ / Mobile Suit V Gundam — Nenecha Squad Bikini

IMZ- O-Ring Bikini Flux

Heart-shaped O-Ring Bikini (Illustrious)

Sling Bikini Top & O-Ring Bikini - Clothes (Illustrious+Pony)

O-ring bandeau / O-ring bikini