Class representative Yua finds meaning in her existence through the relentless training she receives daily from her teacher to ease her feelings of inferiority. Mirei will do anything to satisfy her favorite classmate's request. Hikaru is confessed to by a classmate, but can't forget the pleasure she felt from the sexual training she received from her homeroom teacher. Walnut uses her body to comfort a classmate who has been rejected. This book contains 4 stories about sex told by high school girls.