Shunrin, a girl living as an apprentice Doushi in Kayu, a country where martial arts are popular, is excited because this year the Brave Martial Arts Tournament will be held to determine the strongest man in the country. However, on the day of the tournament, assailants appear at the venue and begin attacking the people. The semi-finalists of this tournament join forces and somehow manage to bring the situation under control... But this is just the beginning. Despite clashing with and betraying their allies, they will protect their loved ones and their pride, and she will fight for the man she loves! What will their fate and the future of their country hold?