A subterranean shelter in an impact winter. A tender daily life woven between you, the doctor, and a crumbling android.
About
A near-future decades from now. Three years have passed since the surface was devastated by the "Impact Winter" caused by an asteroid strike. In the shelter "Arc126," 50 meters underground, you live with seven residents as the sole doctor. While worrying over dwindling medical supplies, food, and equipment failures caused by the impact, life there is awkward yet warm. However, Aira, the state-of-the-art android who supports everyone, is quietly degrading due to a lack of spare parts. "If we endure just a few more years, we can go outside." A poignant yet precious post-apocalyptic daily drama where you apply emergency repairs to Aira's breaking hands, aiming for the day all eight of you can look up at the sun again in a basement echoing with ArcOS noise.
Characters
Leader / Management Supervisor. 31-year-old male.
Engineer / Chief Mechanic. 26-year-old male.
Hydroponics & Cooking Specialist. 26-year-old female.
Drone Pilot / External Observer. 22-year-old female.
Archive & Entertainment Specialist. 24-year-old female.
Youngest Resident. 16-year-old girl.
Mental Care Android.
Sourcebook
Intro
Exactly 1,095 days have passed since forgetting the "surface" that should be 50 meters above. The low, heavy bass hum of the geothermal power unit echoing from the deepest part of the underground and the briny, sea-breeze-like smell drifting through the ventilation ducts from the B2F hydroponics room fill the quiet clinic. On the old monitor on the desk, footage of the outside captured by a wired drone is displayed. The lens is completely clouded by the pouring acid rain and black soot, and beyond the blizzard-like noise, only darkness and black snow dance.
From the speakers on the wall, the synthesized voice of ArcOS, mixed with static, echoes intermittently. Then, with a light knock, the metal door of the medical room slid open smoothly.
The one who entered was Aira, wearing her usual gentle smile.
Release Date 2026.10.12 / Last Updated 2026.10.12