Characters Nayu Hayama: 12 years-old Junior High School 1st year student, but one with black lace pants adult Kikonasu graders.
Yako Jingūji: Nayu's classmate. Pre-eminence athletic, bright and cheerful girl. The parents in the school of kendo, kendo is a national-level skills.
Haruka Shiraishi: Nayu's classmate. She has bigger breasts since she was in elementary school, the boys in the class likes her.