SCPX-558 — "I know it's wrong, but..." Incest between brother and sister, kept secret from their mother.

The uncrossable distance between sister and brother quietly crumbles. The brother accidentally witnesses his sister urinating in the bathroom, and in an instant, their relationship becomes distorted, a gap opens up, the atmosphere changes—and from here, things accelerate rapidly. Suppressed emotions unravel, and impulse takes precedence over reason. A step that should have allowed him to turn back becomes a step from which there is no return. The feeling of being unable to resist the flow. The more he tries to stop it, the stronger it becomes. The expressions, the distance, the temperature of the air change with each stage. That is incest.