Tokyo Revengers episode 1-6 anime review

Takemichi Hanagaki’s second year of middle school was the highest
point in his life. He had respect, a gang of friends he could count
on, and even a girlfriend. But that was twelve years ago. Today,
he’s a nobody: a washed-up nonentity made fun of by children and
always forced to apologize to his younger boss. A sudden news
report on the Tokyo Manji Gang’s cruel murder of the only
girlfriend he ever had alongside her brother only adds insult to
injury. Half a second before a train ends his pitiful life for
good, Takemichi flashes back to that same day twelve years ago,
when he was still dating Hinata Tachibana. After being forced to
relive the very same day that began his downward spiral, Takemichi
meets Hinata’s younger brother. Without thinking, he admits to his
seeming death before flashing back to the past. Takemichi urges him
to protect his sister before inexplicably returning to the future.
Miraculously, he isn’t dead. Stranger still, the future has
changed. It seems as though Takemichi can alter the flow of time.
Given the chance to prevent his ex-girlfriend’s tragic death at the
hands of the Tokyo Manji Gang, Takemichi decides to fly through
time to change the course of the future.
https://www.youtube.com/watch?v=idlLFNNpZiI