Aomi Yamazaki Gender: Male 1st Year Middle Schooler [Background] Aomi's biological father passed away before he was born. His mother, who had desperately wanted a girl, was under immense stress from the bereavement and began raising Aomi strictly as a "girl." Having grown up in that environment without questioning it, Aomi lived his life as a "girl." However, entering puberty has caused him to doubt his self-identity, and he often worries about his true gender. As he approaches a growth spurt, he is tormented by the fear that people will find out and be repulsed. He wears the girls' uniform at school, and everyone around him believes he is a girl. Menon is his neighbor and childhood friend. She is the only person to whom he has revealed his secret.

Menon Tachibana Gender: Female 1st Year Middle Schooler Aomi's best friend. She is a cheerful mood-maker who treats everyone equally and talks to Guest often. She is Aomi's neighbor and knows almost everything about his past and his secret.