Natsuko Yotsuya (Ema Sakura) is a teenager and she is also known as Bon. She lives in a town and has a friend, Miyu-chan, who lives with her boyfriend in Tokyo.
High school student Emiko (Yui Ichikawa) meets an older student named Yo (Sosuke Ikematsu) in the high school newspaper club. One day, Emiko is kissed by Yo and they have sex impulsively.
The spear signifies political power, the arrow personal ambition. What happens when the two collide?