A low ranking yakuza who spends more time enjoying life than doing the yakuza work falls in love with a pretty student girl, whose brother later gets drawn into the yakuza business against his own wishes.

Matsukichi, a worker at a fish market, tries to settle the business between the two competitors on his turf.

Part two.

Yakuza Kojima appeared in Yokkaichi in search of her mother who died when she was young. There he met Torajiro, a master of kendo, who had just left prison after slashing his adoptive father who stole his son's wife. Torajiro was on his way to his brother-in-law, Iwai. While talking about themselves, they someday felt something similar to friendship.

In the aftermath of the most devastating conflict mankind had ever experienced, the tiny island of Shikotan became part of the Sakhalin Oblast... and on the unhealed border in this remote corner of the world, friendship among children from two different countries timidly blossomed, striving to overcome language barriers and the waves of history. Inspired by true events.