雛人形の頭師を目指す五条新菜（野村康太）は雛人形に一途すぎるがゆえ、同世代の友達と趣味が合わずクラスに馴染めずにいた。ある日、家のミシンが壊れてしまい雛人形の服が作れずに困っていた新菜は、高校の被服室でミシンを借りることを思いつく。早朝誰も居ない被服室で新菜が服を作っていると、そこにクラスの中心的な存在、喜多川海夢（永瀬莉子）がやってきてしまう。海夢はギャルで明るく、新菜にとっては住む世界が違う存在。そんな海夢に服を作っているところを見られてしまった新菜は、驚きのあまり雛人形を床に落としてしまう。過去のトラウマから咄嗟に雛人形を隠す新菜だったが、海夢は新菜が想像していた反応とは違い、雛人形を見て褒めてくれたのだった。そんな新菜に対して海夢が突然、裁縫のできる五条くんに見てほしいものがあると服を脱ぎ始め―。
Wakana Gojo (Kouta Nomura), an aspiring Hina doll craftsman, struggles to connect with his classmates due to his singular devotion to his craft. One day, when his sewing machine breaks, he decides to borrow the one in the school’s home economics room early in the morning, hoping to work unnoticed. However, Marin Kitagawa (Riko Nagase), a bright and outgoing classmate from a seemingly different world, unexpectedly walks in.
Caught making doll clothes, Wakana panics and accidentally drops his Hina doll. Overwhelmed by past trauma, he quickly tries to hide it, only for Marin to surprise him with her genuine praise. Breaking Wakana’s expectations, Marin then asks him for help with something that only someone skilled in sewing like him could handle, setting their story in motion.
