My Dress-Up Darling

Wakana Gojo is a high school student with a secret admiration for hina dolls and aspires to become a craftsman like his grandfather. Having been socially traumatized for his passion, he had closed himself off from everyone. One day at school, his classmate Marin Kitagawa runs into him using a sewing machine for making a doll's costume. After admiring Wakana's doll and praising his work, Marin asks if Wakana could help her create cosplays. (wikipedia.org)