Koga Nozomu has a secret. She is a trans girl. However, her friends do not know about it and mistake her for a boy. As they spend time together, their conversations are filled with stereotypical notions of what women and men should be like. Looking for advice, Nozomu tries to come out in front of her trusted teacher, but finds that she does not understand. When it comes to light that Nozomu is secretly going to the girls 'toilet and wearing a girls' school uniform in her backpack, she experiences increasing bullying and exclusion from her schoolmates until she can no longer bear it.