Tokyo Revengers: Once upon a time

SINOPSIS

2 years ago, Mikey, Draken, Baji, Mitsuya, Pah-chin, and Kazutora had their gang uniforms made and they all took a trip to Kanagawa on their motorcycles. Meanwhile, their commander Mikey rode his moped, Street Hawk. They get surrounded by a local biker gang, but Mikey shows no fear and tells the older gang members that he'll kill them if they lay a finger on his Street Hawk.