One summer day. Saito Minazuki, who was six years old at the time, happened to find a beautiful girl named Machigane Riri in the mountains and saved her from falling into a waterfall. Since then, the two became childhood friends and often played together, even though their homes were quite far apart. They went to different elementary and junior high schools, but this year they entered the same high school. One day, while they were going to school together, Riri was confessed to by a guy who was always surrounded by a group of cute girls who were always rumored at the school. “Hey, I heard you’re the main heroine of that guy. ” “Fufu, I know. ” For some reason, the childhood friend who said that and smiled meaningfully is still with Saito today. Huh, aren’t you guys going out? This is a story of two people who should never have met each other in the original story and become childhood friends.