"Drop" tells the story of a boy named Shinanogawa Hiroshi (Hiroki Narimiya) , who grew up in the 1980s. He became inspired by the Be-Bop High School manga and decided to become a delinquent. Hiroshi dropped out of a private middle school and transferred to a public school. With his hair in a very shot hairstyle dyed to red, he attracts the attention of the schools gang lead by Iguchi Tatsuya (Hiro Mizushima). After a fight with Tatsuya, Hiroshi ends up joining their delinquent gang. What follows is the story of friendship and making the right choices.