Haruna Ikezawa

Two young wrestlers face each other in a recently revived underground wrestling organization, the Tiger's Lair, which destroyed the wrestling dojo they grew up in. One took over the training facilities of Naoto Date at the foot of Mount Fuji, as well as the mask he left behind. The other dared to enter the Tiger's Lair and won a fierce competition, receiving a jet-black tiger mask. One tiger walks the path of light, while the other walks the path of shadows. Neither one knows the other's face. On the ring, they are natural enemies, but they have the same purpose-destroy the Tiger's Lair!

One day, 15-year-old delinquent Oga Tatsumi finds a body floating down a river. The body splits open, and out comes a baby boy. The baby soon becomes attached to Oga. This baby, however, is not a normal baby, for he is actually the son of a demon lord.

Kouichi Sanada and Kazuki Aihara's childhood friend Mao Mizusawa has returned after living in France for a couple of years. Kouichi is surprised to learn that, since her parents are remaining overseas for the time being, his mother has agreed to let Mao stay with them. The three friends help each other deal with the ups and downs of high school romance.

One hundred Mamodo (lit. "demon") go to Earth every 1,000 years to battle to be the king of the Mamodo world. Each Mamodo needs a human partner in order to use his or her spell book, a book that seals the powers of the Mamodo. If the spell book is burned, the Mamodo is forced to return to the Mamodo world. The last Mamodo standing without their book burnt is the new Mamodo king.