Regret haunts mercilessly—a bitter curse etched into the soul, impossible to reverse. It's the realization that wounds inflicted never truly mend, that countless pleas for absolution remain forever hollow. The cruelest form? Understanding someone's value only when they've slipped away, leaving you drowning in useless anguish. I learned this truth intimately—because I am the one who enslaved the Heroines. Every emotion within them bent to my will. I weaponized their deepest vulnerability: regret itself. Enter a world where a driven MC discovers hypnotic power and weaponizes it without restraint. Watch as his relentless ambition gradually corrupts him into something sinister. Through psychological manipulation, the heroines surrender completely—not through cheap romance, but through calculated emotional devastation. He claims his harem the hard way, paying dearly for every step forward while never catching a break. Progressive growth fuels his ascension as he transforms from underdog into calculated villain, his revenge methodical and inevitable. This isn't typical harem fare. No instant attraction, no convenient chemistry—only raw suffering, slow-burn devotion, and the psychological unraveling of both manipulator and manipulated. **Content Notice:** No NTR or Yuri present. The MC employs hypnosis for personal development and interpersonal control, not explicit scenes. Early and mid-chapters contain zero sexual content; potential future inclusion only after extensive story progression.