Mari Tamaki, AKA Kimari, really wanted to have a great adventure in high school, but could never take the first step. Now in her second year, she meets Shirase Kobuchizawa, a girl who is determined to go to Antarctica despite being told it's impossible. Kimari is so moved by Shirase's indomitable spirit that she vows to go to Antarctica with her.

Kimari wakes up to the sound of her alarm and goes through her duties for the day. The girls have gotten used to their lives in Antarctica, but the summer team will have to leave in three days. Their journey of a lifetime is reaching its end.