Mika Tahara has just started high school and yearns to fall in love. However, to her dismay, a gal-like boy in her grade, Nozomu, acquires her cell phone number and begins to call her frequently. When summer vacation starts, one day, Nozomu drunkenly phones her, but his friend Hiro confiscates the phone and converses with her instead. Although Mika does not know who Hiro is, she feels at ease at the sound of his voice and the two befriend each other.
Mika and Hiro agree to meet each other when school starts, and to Mika's shock, Hiro turns out to be the delinquent boy she is afraid of, who proves...