In a bleak society governed by the National Welfare Act, young adults face a grim reality: being selected to die for the nation's prosperity. Chosen individuals, aged 18-24, receive ominous notifications called 'Ikigami' just a day before a nanocapsule ends their lives. Kengo Fujimoto, a hesitant Ikigami messenger, grapples with the moral weight of this law. To navigate his ambivalence discreetly, Kengo embarks on delivering these fateful messages, hoping to crystallize his beliefs. As he witnesses the varied responses of the chosen—acts of kindness, bursts of passion—Kengo's journey sheds light on the profound ripple effects these final moments have on society. Through these encounters, Kengo's ultimate stance on the controversial act takes shape, illuminating the intricate web of human emotions and choices in the face of imminent death.