Hiyori Nishiyama is a 15-years-old girl who is extremely shy and short. After being hospitalized for a year, due to a car accident, she starts going to high school as a freshman, along with her best friend Ritsuka. In her class there is a boy who is very tall and seems to have a lot of friends. His name is Yuushin Hirose and becomes Hiyori's friend (even if at the beginning Hiyori is not very happy with his habits). After an accident where her panties were shown to the class, she starts making friends and falls in love with Yuushin, but due to her shyness, she does not know how to confess to him.