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.

At last, the girls have arrived in Antarctica, and are awed by the scene before them. No one's been at Syowa Station in three years, so there's a lot to do to get it cleaned up. As the girls keep themselves busy, Yuzuki seems to make up her mind about something.