Responses
it might not be the one you're looking for but i know of a bl where one of them is a doll but turns into a human
https://www.mangago.zone/read-manga/lovers_doll/
Might be this one. The seme's brother kidnaps the doll, can't remember why.
https://www.mangago.zone/read-manga/dareka_yume_dato_ittekure/
Okay so it's a bl, uhm I think it's a manga, where the uke is connected to some doll or something. On scenario is that the the butler (?) kidnapped him because the butler thought that the seme is getting softer because of the uke.