Saki Oryan had always lived a quiet, disciplined life, guided by strong moral principles, so he never anticipated how swiftly his world could unravel.

It all happened in a single moment.

An intrusive, inappropriate ad that flickered onto his screen—an ad he should have simply dismissed—became the entry point for something far more sinister. In that instant, a predatory "Taboo System" took root deep within his mind, rewriting his thoughts, his desires, and his very boundaries.

Now, the young man everyone once relied on is transforming.

Tormented by overwhelming urges and a system that relentlessly drives him toward the forbidden, Saki finds himself in a fight he never wanted—a struggle between his former self and the person he is rapidly becoming.

Because of the system, nothing is off-limits.

And resisting it may cost him everything.

Chapter 5 - Grim gang I