 If you liked Rainbow: Nisha Rokubou no Shichinin |  ...then you might like Tokyo Revengers |
Both the mc's are in bottom socities voilence, fights , bonds, thrills. only ignore that Tokyo revengers has time travel which is almost nonexistent as it used as a tool. real life scenarios in both.
report Recommended by misthistoric
Animes for real men, about friendship and masculinity
report Recommended by Saburiminaru
Both anime show that friendship and comaradery can flourish even in harsh environments, and both, despite taking place in different periods of time, feature juvenil delinquents as main characters, so you should expect a good ammount of fights. The main differences between both is that Tokyo Revengers has time travel and the protagonist is led rather by a romantic motive, while Rainbow shows the harsh life of prison in post-WWII Japan.