The first person I fell in love with was my best friend's boyfriend—Reina, her best friend Rio, her boyfriend Hajime, and their male friend Daichi were all close friends in university. During a two-day, one-night camping trip, they learn that "Rio actually likes Daichi." Reina, who had been interested in Hajime, wavers in her feelings... and ends up having a relationship with Rio's boyfriend, Hajime... A debut collaboration between the master of youth dramas, Asagiri Jyou, and Reina Miyauchi! A genuine pure love drama depicting the heart-wrenching emotions of men and women.