I Don't Need My Childhood Sweetheart.

"Aren, do you want to run with me?" Kato Naruben, who loved running because of the girl's invitation, spent two happy years with the girl, but the girl left without saying goodbye the year before they went to elementary school. Ten years passed by in a blink of an eye. On the first day of high school, he once again met a girl who loved running. What kind of story would happen this time? This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.