Based on the manga Salaryman Kintaro.
There`s also a game with the same name.
And a live-action series.
But this is the anime, by Emotion (Bandai Visual)
"It`s about Kintaro, former leader of a widely feared and respected biker gang, who decides that its time to `straighten out` and become a `salaryman` since his wife died and he has to take care of his young son."
Sounds similar to GTO, but it isnt.
Well, it is a little similar, but its original.
I`d say its more like a modern day anime version of "Lone wolf and cub" then it is a GTO copy.
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