BJD in Manga

Was it Neringu Project?

 

Rozen Maiden has seven dolls but the rest of your description doesn't match, from what little I recall..

EDITED TO ADD: I just googled Neringu Project and that sounds like @Epicari knows what you're looking for.

Teddy

 

I don't know which one you are referring to exactly, but these two came to mind:
1. The Princess's Doll Shop Princess’s Doll Shop Manga - ZINMANHWA
A young girl - a nominal princess - escaped from the palace and opened up her own doll shop. She makes several male dolls that were helpful for her.

2. Shounen Dolls Shounen Dolls Manga Online Free - Manganelo
A girl who can speak to dolls is on the quest to becoming the true heir of a family clan of dollmakers.

And while we're on the topic of doll-related manga, here are a couple you might be interested in.
3. Mitsukaru Mihara, Dolls Doll (manga) - Wikipedia
Doll-looking androids and their stories.

4. Mishima Kazuhiko, Lover Doll Lovers Doll.
Caution: BL content

If you find the one you are looking for, please let us know! I'd love to add one more doll-related manga to my list.

 

I know exactly which manga you're talking about, I had it saved before but my previous phone died and I lost all my bookmarked manga TT I'll do a quick search and see if I can find it again

Edit: is it amane gymnasium?

 

I know especially since it's one of the only mangas I've found that actually have bjds in it

 

Thank you for sharing!! I started reading some of these and they are so cute!