"Back then, I didn't even consider thinking that we would fall apart some day." Kanade, Yuuji, and Souma are childhood friends. Yuuji can be rude at times, but has a strong sense of responsibility. Souma is the popular kid in class. Kanade is shy and always looks up to the other two. The three of them had promised to always be best friends, but things began to change when Souma started dating a girl in high school. Emotions waver and hearts are broken, as a love triangle between three childhood friends unfolds.