TL;DR: Two anti-demon exorcists sneak into their business rival's house by pretending to be dolls, with the help of his own daughter, after they were driven out of business and had their exorcist powers sealed.
After running it through an OCR and machine translation, I'd say it's technically non-h since there's no sex, but with how dark it is it's still definitely 18+.
Somewhat longer TL;DR version is that the daughter casts an experimental spell that makes the two exorcists take on the "position" of a couple of her Precure dolls, which causes everyone who sees them think that's what they are. They successfully sneak in and get the seal undone, but before they can leave again and undo the doll spell, their wigs and costumes start to fuse with their bodies and they gradually start turning into plastic figurines. After a couple of failed attempts to undo the spell, they end up becoming the daughter's personal maids as well as her dolls, which allows them to move again but forces them to obey everything she says. Through a series of accidental orders and miscommunication, they end up stuck frozen as the centerpieces of the daughter's Precure collection, only being able to move in order to clean it or to play with her, and are forbidden from asking her to change them back. Though they have their powers back, all they can use them for like this is to telepathically communicate with each other (but not the daughter) as they contemplate spending the rest of their lives as dolls, with the only person capable of helping them thinking they like it this way.