Reborn

Resist

Resolve

Relieve

Revolve

Return

Rejoin

Reseparate

Releap

Reply

Reburn

Remind

Zero

Regret

Resort

Revive

Reignition

Redivide

Recharge

Restart

Reinspire

Revolt

Reconflict

Reseek

Revoke

Rerise

Realize

Regain

Reel

Respect

Recept

Recognize

Rebuild

Revenge

Darkest Hour

Odds and Ends

Anyone's Guess

Enter the Stage

Break Up

My buddy

No pain, no gain

Double cross

Once upon a time

In those Days

Screw up

Take Out on

Made Up my Mind

Level With

No Way

Grow Apart

Before Dawn

Open Fire

Never Fear, I'm Here

Turn Around

Below the Belt

No Match For

The One

Look Up For

Dead or Alive

Get Mad

One and Only

In Tears

Last Wishes

One for All

End of War

My Fam

Have an Affair

Man-Crush

Sunday Best

Big Moment

Tide Turns

Same Old Same Old

An Old Tale

A Crybaby

Get Back

Let One Down

It is What It is

Gotta Go

Hey, Pal

Fuck Off

Thicker than Water 

Stand Alone

Last Order

Life comes and Goes

too late to be sorry

can take it

last but not least

twin to dragon

You're not my type

When it rains, it pours

Brother in arms

Two peas in a pod

No way

gang of four

pep party

Hanagaki Takemichi was once a low-life punk, but after biting off more than he could chew with a gang in middle school, he ran away from his old life. Now that he’s an adult, the gang that once terrorized him has grown into the largest gang in Tokyo, and they’ve started killing people–including his old girlfriend! After learning this news, a mysterious force on a train platform shoves Takemichi right in front of an approaching train. As his life flashes before his eyes, he blinks to find himself transported back to middle school, before he fled from the gang! Now he has the chance to right what went wrong all those years ago. Can he save his girlfriend’s life in the future–and what else might he change if he’s rewriting the past?
 
(Source: Seven Seas Entertainment)
 
Notes: 
- Winner of the Shounen Manga category of the 44th annual Kodansha Manga Awards. 
- Includes 1 extra chapter.