Sora, a young man hospitalized after sustaining a life-threatening injury, draws the interest of hospital director Reika Mikage due to his exceptional physical resilience. She recruits him for a clinical trial testing an experimental drug. Lacking immediate family, nurse Yu Yagami is designated to monitor his treatment, granting Sora access to interact with Yu and staff as part of his trial participation. The repercussions of his injury and the unorthodox treatment gradually mold his place within the hospital’s structured dynamics.