Tập 4: Ryo làm việc tại cảng để kiếm tiền mua vé đến Hong Kong trong khi đối mặt với các mối đe dọa từ băng đảng.

After discovering he would need a total of 150,000¥ to purchase a plane ticket to Hong Kong, Ryo starts working for a company in the harbor thanks in part to help from Goro and Mai. Once hired, the boss introduces him to the taciturn Mark who is requested to show him the ropes of how to operate forklifts. Mark's lesson is brief, but Ryo gets the hang of it quickly. At the end of the day, Ryo is met by Goro, who shows him around the harbor and explains that they would chalk up the numbers of empty warehouses his group could find to hang out in. Meanwhile, Terry from the Mad Angels is informed by his men about how Ryo is snooping around their turf. That night, Ryo runs into Nozomi and they talk at the Sakura Park, and there Ryo elaborates about his search for the truth behind his father's death. The next day after work, Mark is beaten by members of the Mad Angels for knowing Ryo, despite him denying this. When Ryo arrives, Mark demands he flee, but he stays and defeats the men attacking him. Mark reveals he is working at the harbor to find his son, who had joined the Mad Angels. That same night, after making a flower delivery at a harbor bar, Nozomi tails two members she overhears to be from the Mad Angels due to her recent discussion with Goro and Mai about Ryo getting involved in a dispute with the gang, only to be caught and be used as a bargaining chip by them. Ryo discovers her captivity by the Mad Angels, who proceed force him to fight and kill the Chen's Guizhang to free Nozomi. Before confronting Guizhang, Ryo manages to write the number of the warehouse Nozomi is being held in for Gozo to find. Ryo then confronts Guizhang, and they both fight until they're seemingly knocked out by each other. (Source: Wikipedia)

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