Ah, sure! No spoilers so don't worry about my reply.
Quest's bad ending can be achieved when you press the second option, which is platonically option. I was kinda confused on why he seems to be disappointed after that because at my first gameplay, there was no other options (must have messed up my choices throughout in chats and calls) other than that. You'll see what happen next once you got to day 7, which is where the endings are.