The sun has vanished, and something new took its place. The world is covered in light blue colour as anyone who looks at the mysterious celestial body mutates horribly, turning into violent monsters.

You live in a huge apartment building, and now have to survive on a little resources it can provide.

Characters:

Natsuki Toyoda, your tsundere childhood friend and the girl you share your apartment with.

Hinata Omi, a shy girl from your college class who ducks into your building as the worst starts.

Aoi Miyata is a sportswoman who leaves next door. You barely know eachother, but you do know that she collected many gold medals throughout her short career.

Erika Saito is a shut in streamer who lives across from you.