A Tempest of Cage

Ten years have passed since the tragic death of Takahisa Umezaki, the eldest son of the Umezaki family. Although he had a weak body, what brought on his demise was a nasty storm and unstable ground near a cliff. Although, in Yoshihisa's mind, the catalyst for his brother's death was Kai's sudden betrayal. It has been ten years and Takahisa's death still lingers in their minds. Yoshihisa tracks down Kai and tries to force the truth out of him. Why did Takahisa die? It has been ten years and Yoshihisa remembers something about Takahisa's death...