Sophomore and representative of the archery club, Shimada Hibiki is a 17-year-old student who has never been in love. During her high school's entrance ceremony she sees Kosaku Ito, her 26-year-old world history teacher, who is well known to be a stern and cold person. Hibiki, rescued by Ito after a minor incident, discovers that their teacher is actually compassionate towards others and starts to develop romantic feelings for him. Hibiki confesses,
