Hi i read this manga years ago . It's historical setting. It was about a noble guy who took in a 5 year old girl who's the daughter of a courtesan (green hair and green eyes i think really really cute) anyway the male lead kinda like molested that girl at that age. But finally raped her at the age of 12? I guess. Then this guy had a room somewhere in his mansion where's everyone is forbidden to go in turns out there's a doll who looks exactly like her but in adult version something.
I think I found it
https://www.mangago.me/read-manga/toriko_aigan_shoujo/
second hand embarassment