Ryuya Masunari

Hayaki, an aspiring medical office worker, wakes up naked in an oil drum. When she asked for help through a hole in front of her face, Yuhei, a man who looked like a researcher, came to her. He threatens her, saying, "This is a clinical trial and you need money to get out.

Third son Raizo is a good man, but when another organization targets his father and his family business, it awakens his violent side.