sentences:  As a result, Kouga does not have much time to live and his life shortens every time he dons his armor, as well as suffering chest pains from time to time and his body gradually weakens over time.Hiding his condition from Kaoru, Kouga continues his duties as he investigate red-masked man before learning of his identity as Sigma Fudō whose plan to end the Horror menace with the power of Gyanon nearly sends the world into chaos.Though he defeats Sigma, revealed to be one of the friends thought to be devoured by Raizon, Kouga had to leave to honor the contract he made to Gajari to achieve his victory by traveling to the Promised Land to retrieve the Fang of Sorrow during the events of "".