Mari Tamaki (voiced by Minase Inori) is a sophomore girl at Tatara Nishi High School. She is lively and cheerful by nature and is a girl who is easily curious about new things, but her cautious and timid nature makes her often stop at these things and cannot go deeper. On this day, Mari met a classmate named Kobuchizawa Houze (voiced by Hanazawa Kana), whose mother is a member of the Antarctic Observation Team. Therefore, from a very young age, Mari was full of curiosity about the frozen land of Antarctica. Under the influence of Houze, Mari began to yearn to set foot on the land of Antarctica. Miyake Hinata (voiced by Iguchi Yuka), who works part-time at a convenience store with a cheerful personality, and Shiraishi Yuzuki (voiced by Hayami Saori), who is young but unexpectedly mature, led by the captain of the "Antarctic Challenge", Fujido Gin (voiced by Noto Mamiko), the girls began to move towards their dreams.