Hero like me (слэш)

Ichigo and Ishida are captured and imprisoned by an old nemesis of theirs risen from the ashes and bent on revenge.
The boys are subjected to increasingly horrific experiments, abuse and torture. While going through this ordeal, they make some unexpected discoveries about themselves and one another. With only each other to rely on, it may turn out that their worst enemy comes from an unexpected direction... Will these events bring them closer together? Or will they tear them apart?