what i remember is that she was a manga artist and the guy was her assistant. they first met when she was hanging off of her tree at home and he found her and tried to help her and when he saw her he thought she was a little kid because of her height. he started so assist her by making her food and cleaning her house and all that. then towards the end i think they had sex when they were done with the manga or something like that.

Not a hentai. It's called Comic Studio.