(from ebookjapan):

The ferocious beasts the Wild 7... were about to become legends in memory, but they are back! Tobiba, who had lost his memory and with so many mysteries in his mind, has reappeared. What is waiting for Tobiba, who has come back to life as vividly as a phoenix, his future uncertain?

The leader of the group, Tairiku Tobiba, has been resurrected from the depths of hell, and the new Wild 7 are going to exterminate the villains in an ultra-radical manner!