Graphics/Style: similar to girl adrift
Gameplay: the girl stays in the middle of your screen and you got to interact with her every now and then, slightly increasing affection and revealing more lore with time. You got to bring her gifts and change her outfits later on. There were some mini games (food sorting, outfit choosing, etc.) to get money for said gifts and picnics as well as furniture and food. That's what i remember at least.
Lore: she lost her memories and you found her at your doorstep (i think), I don't remember other details unfortunately.
Characters: the girl (you name her), who looks like the character from girl adrift. And you.
I played this games a couple years ago but forgot about it and can't seem to find it anymore. It might be older than stated tho. Thank you for your efforts in advance!