From the liner notes

Based on the best-selling fantasy novel by Manabu Makime, Battle League HORUMO is a combat action comedy that will take you into a world with the breathtaking backdrop of Kyoto and bizarre legend of "Horumo". Battle League HORUMO is directed by Katsuhide Motoki and stars Takayuki Yamada, Chiaki Kuriyama, and Sei Ashina.

After failing the entrance exam and enduring 2 years of cram school, Akira Abe (Takayuki Yamada) finally gets accepted to the prestigious Kyoto University. One day on his way home with a friend, they meet a senior who invites them to a welcome party hosted by his club “Azure Dragon.” With nothing to lose, they decide to go for the free food, and there, Abe meets Kyoko Sawara, the girl with the perfect nose, and falls head over heels for her. Abe drags his friend Takamura to join the club with him in hopes that he can get closer to the girl of his dreams.

At first, the club appears to be an ordinary social club but the new members soon find out about the 1000 year-old tradition upheld by the four universities of Kyoto and the Battle League HORUMO. The battle is fought between 10 players from each team with the players manipulating an army of 100 spirits (referred to as Oni) to fight the opponent. The members go through a rigorous training achieving the fluency of the Oni language as well as the indefinable gestures required to go along with it. Let the battles begin!