Oᴚɢᴀɴɪᴢᴇᴅ Cʜᴀᴏs ?
You can download it or get it from steam for free.
Anyways it is a dating simulator consists of 4 girls. This game looks innocent as the girls are cute looking and it has an innocent looking background and etc. Don't let the innocence fool you as this game has a very deep and dark twist.
In other words. It's disturbing. Had trouble sleeping because I kept thinking about it after I got to the end.