This was something Heisuke had kept hidden in the two lifetimes. Only he, Kousuke himself and President Kishimoto were aware of the truth.
Under Hisaki's stunned look, Heisuke continued his story. His voice and countenance were as calm as a slow-moving stream, a contrast to the turbulence in her heart.
"Kousuke tried to rescue me from the men. But, it cost him his ability to walk forever. That's why... I was willing to go to prison."
Heisuke chose to let go of his freedom for the price Kousuke had to bear for saving him. Once he knew his childhood friend became disabled because of him, immense guilt clawed into his heart.
To Heisuke, being imprisoned was nothing compared to the agony Kousuke had to endure for the rest of his life. He tightly kept the truth a secret, fearing that his mother and Shuuya would persuade him not to accept the sentence.
Finally, we've reached this part :')