In this town, Kagosuke and Ryukichi of the Okamoto family, who are deeply committed to the yakuza way, are straightforward and justice-loving hot-blooded men. However, their slight clumsiness is a flaw, but they are extremely strong in fights, and there's no one who can match them. They are head over heels for Osen-san. They are both desperately unwilling to yield even if the other is a brother.
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