When a Cosplayer Meets Her Perfect Dressmaker

Wakana Gojo, a high school student, is obsessed with making Hina dolls.
He has trouble making friends or even holding a conversation because he has no one to share his obsession with.
However, when the school's most popular girl, Marin Kitagawa, reveals her own secret, he discovers a new use for his sewing skills.

Anime Title: My Dress-up Darling