Currently you are able to watch "My Dress-Up Darling" streaming on Crunchyroll, Funimation Now or for free with ads on Crunchyroll. It is also possible to buy "My Dress-Up Darling" as download on Amazon Video, Microsoft Store.
Wakana Gojo is a high school boy who wants to become a kashirashi--a master craftsman who makes traditional Japanese Hina dolls. Though he's gung-ho about the craft, he knows nothing about the latest trends, and has a hard time fitting in with his class. The popular kids--especially one girl, Marin Kitagawa--seem like they live in a completely different world. That all changes one day, when she shares an unexpected secret with him, and their completely different worlds collide.