In a world ravaged by disaster, humanity's remnants lead tranquil lives in the twilight era. Alpha Hatsuseno, an android at a quiet Yokohama cafe, eagerly awaits her owner's return. When the courier android Kokone Takatsu delivers a package containing a camera, Alpha embarks on a journey of reminiscence through photography. 'Yokohama Kaidashi Kikou' gracefully unfolds as it captures Alpha's serene moments and poignant encounters, set against a backdrop of peaceful solitude.