This work is a socialist revenge suspense drama that describes the fate of the illegal resident "HIRU" who lives on others and the dark side of the social class.

Yuki Shinomiya (Eiji Akaso) is a 21-year-old man, who doesn't have friends. He spends his lonely days working part-time jobs. One day, he comes back home from work and finds a strange man sitting in his room. The man has a knife stab wound. The man is taken to the hospital and he introduces himself as Yuki Shinomiya to a detective there. He also points to Yuki Shinomiya and tells the detective that he stabbed him. Yuki Shinomiya runs away from the hospital and becomes a fugitive. At that time, a mysterious woman named Zoka appears in front of Yuki Shinomiya and asks him to help her take revenge on the person responsible for her father's death. Zoka is referred as a "Hiru", a term for people who don't have a home and wander around. Together, Yuki and Zoka meet Kara (Kentaro Sakaguchi), a legendary Hiru who has been living this way just to get his revenge.—AsianWiki

The first season will center on Shinomiya Yuki (Akaso Eiji), a man whose identity was stolen by a hiru, learns of their existence. He struggles to reclaim his identity as he escapes the authorities for a crime he did not commit. The second season will focus on Kara (Sakaguchi Kentaro), a mysterious hiru who lives for revenge.—liveactionasia

21-year-old Shinomiya Yuki has no friends and spends his days alone working part-time jobs. One day, when he returns home as usual after a night shift at his part-time job, a male stranger Yobi who has been stabbed in the abdomen with a knife is sitting in his room. Yobi wakes up at the hospital that he has been taken to and identifies himself as Shinomiya Yuki to detectives. Then he points to Yuki and states that he was stabbed by him. Yuki flees the hospital right away and becomes a fugitive instantly. At that moment, a mysterious young woman called Zoka appears right before Yuki and offers a helping hand. She tells Yuki that Yobi is a "leech" who has been living off him. After a narrow escape from a sudden attack by Yobi's underling, Zoka negotiates with Yuki to help her take revenge on Yobi who murdered her father. He decides to collaborate with her and recover his name. Zoka is a "leech" who goes from one house to another while its occupants are away. The two of them eventually encounter Kara, a legendary "leech" who lives like an empty shell solely for the purpose of revenge.—jdramas.wordpress.com