ブラックジャックによろしく E1: Eijiro Saito graduated from the prestigious Eiroku University Medical Department and started his residency at Eiroku University Hospital. Eijiro's first internship is in Surgery Department 1, and his supervisor is Takahisa Shiratori, who is said to be a talented surgeon. Eijiro is training with Kuniya Dekune and Masaomi Munakata. However, the reality of the internship is that he is a page boy, working an average of sixteen hours a day for 38,000 yen a month! He has to earn his living by working part-time as a duty worker at another hospital. Eijiro chooses Seido Hospital, where Osamu Hattori is the director. The operating room, which accepts emergency patients from traffic accidents, is a veritable battlefield. There, he is shocked by the work of doctors Katsuo Ushida and Kaori Akagi.