Aya, a philanthropist, has pure feelings for her childhood friend and loves to serve others. She is a mysterious high school girl whose sense of self is established when she is desired. Towa, who is called the class president, is confessed to by her favorite classmate, but falls into the training sex of her homeroom teacher, who calls it career guidance. Hinami secretly has feelings for a girl in her class. Jealous after finding out about her feelings, she lets a male student play with her... Lin is confessed to by a childhood friend and classmate. She is fed up with her homeroom teacher knowing her weakness and playing with her, so she asks her childhood friend for help, but he already belongs to another girl... This book contains sex-related stories by high school girls set in a school.