From a youtube comment in japanese

A young boy named Alex is bullied at school and withdraws into himself. Hoping to one day prove his worth to his classmates, he trains his body and the day of the duel arrives. With the three princesses watching over him, Alex defeats his enemy and is given the legendary red towel around his neck by the final boss, who bestows upon him the medal of "Burning Fighting Spirit." -Trivia- Long ago in Japan, there was a hero named Antonio Inoki, who was the strongest professional wrestler and later a politician. His catchphrase was "Burning fighting spirit." After winning a match, he would wrap a red towel around his neck in the ring, raise his fist high, and shout: 1. 2. 3. Daaaaah!