A man is so invested in doll-making that is wife and daughter leave him, and he ends up making a doll that looks like his daughter. That doll comes to life and the manga is just... about the doll being not his daughter, but you know she is basically a daughter, but has insecurities about not being real. Pinocchio but with a cute girl who doesn't go on any real big ruffian/whale adventure and instead walks around being cute and stuff.