Omega wearing a collar

https://www.mangago.zone/read-manga/koishite_kissshite_kanjaitai/

https://www.mangago.zone/read-manga/kiss_wa_tsugai_ni_hizamazuku/
https://www.mangago.zone/read-manga/haga_kun_wa_kamaretai/

https://www.mangago.zone/read-manga/koishite_baby_miyako_mimeko/

if my mind is correct..

There's one where the omega wears, is afraid of alphas, and works as a model. But then his assistant or employee who's an alpha get close to him and they fall in love. What's the name? Does anyone know it?