The Inazuma Empire, which is famous for its wind symbols and maple leaves on every edge of its territory. Led by the very young Emperor, Kazuha Kaedehara.

Unfortunately, Kaedehara's family only has him and his younger sister. However, there are still several members of his extended family except his parents.

Kazuha is enjoying her rest time by carving rocks under the maple tree. Accompanied by his advisor, he was holding back his emotions because his little sister was nowhere to be seen.

"Where is she..."