My Strongest Childhood Friend

My name is Takagi Tōma, a first-year high school student. I'm just an ordinary high school boy like any other. Yet there is one thing that could be called my only distinguishing feature. Hōjō Sana—my childhood friend and girlfriend. She is well-rounded in both academics and athletics, beautiful in appearance, and on top of that, the daughter of the Hōjō Group. We went to different elementary and middle schools, but starting in high school we've been attending the same school...