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.

It's been several months since their training, and the girls' trip to Antarctica is drawing near. With Rin's help, Kimari manages to sort out her luggage, and in doing so, finds a game she borrowed from Megumi a long time ago. When she visits her friend to return it and talk about old times, though, Megumi doesn't seem to remember it at all...

After arriving in Fremantle, the girls get a tour of their icebreaker ship. When Gin mentions that their new room was where Shirase's mother once stayed, the girls check to see if she might have left something behind there...

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.