The sport became even more well-liked than it had ever been seven years after SeiIori and ReijiAsuna won the 7th Gunpla Battle World Tournament by competing against one another using plastic models that could move and talk.
With her handcrafted SD model Winning Gundam, gunpla fighter Fumina Hoshino intends to one day compete in the All-Japan Gunpla Battle Championships.
Unfortunately, Fumina is the only member of her gunpla club, and the championships feature 3 vs. 3 team battles.
Fumina meets Sekai Kamiki, a mystery youngster with red hair, by happenstance; fortunately, Sekai is a skilled gunpla pilot. The squad is completed with the addition of Yuuma Kousaka, a classmate of Fumina, and the three friends set out to win the competition.