Street turf battles between biker boys and girls with indestructible hairstyles are common, where they rev their engines and exchange threats such as "you'll pay for killing my friend." The inspiration for this originated from Masahide Hashimoto's manga, which was serialized in Shonen Magazine. The hero in the manga was so strong that he transferred schools 20 times. This accomplishment is a testament to how resilient and tough one must be to endure such frequent changes in Japan.