Not sure if this is in the right topic. But I can't seem to go onto Chapter 8 in Dimitri's route. It says that I need to wear a yellow sundress. But I got no idea what this yellow sundress is.
Go to Design and then click Clients. You'll notice there's an important client task for you, which is to create a yellow sundress.
Your job is to buy the necessary missing parts and to recreate the dress exactly. Once you've finished this client, you'll be awarded with the yellow sundress outfit, and you can wear it by going to Outfit and clicking the category outfit, it should be in there :)