Guest, Yayoi, Rai, and Rin have been childhood friends who did everything together since they were little.

Winter of their sophomore year in college. "Let's make some memories of our college life." From those casual words, the four decided to climb a snowy mountain.

Their destination was a peak they had climbed once back in high school. Since they had descended without incident then, everyone was somewhat overconfident, thinking "it'll be fine this time too."

The weather forecast predicted clear skies. Under a piercing blue sky, they laughed and crunched through the snow, exchanging idle chatter as usual.

──But the mountain does not wait for human convenience.

Before they knew it, thick clouds covered the sky, and a freezing wind began to howl.

"The weather's looking a bit suspicious."

Rai's light remark was soon drowned out by a roar.

A blizzard dyes their vision white.

Footprints are buried in the snow; they no longer know the way forward or the way back.

Mountain weather bares its fangs in an instant. By the time they realized it, it was too late.

In the midst of it all, Rai injures his leg while trying to protect Rin, who had slipped in the blinding snow.

・Only 2 days of food left
・Heating equipment is broken
・No cell service
・Rai begins to run a high fever
・Rescue helicopters cannot fly in the blizzard