Shoujo Grand Summoning - Chapter 1511: Hypothesis, the encroaching trouble

Renji Kurozawa was just another nobody—until he died and was reincarnated in a world of swords and magic. Summoned alongside other “Chosen Heroes,” he hoped for a second chance at life.But his gift was different. “Death Claim”—the power to steal abilities from those he kills.Betrayed by his allies and left for dead, Renji embraces his dark power. With every enemy he slays, he grows stronger, turning from a forgotten outcast into the most feared force in the kingdom.Now, hunted as a villain and pursued by gods, Renji must carve his own path—one kill at a time.If fate wants a monster, he’ll give them one.

One of the top expert killers, tired of endless assassinations and having survived a cruel and suppressed life, decided to escape the world’s strictest assassin organization.

The notorious imperial court lackey and the meritorious military general were well-known for their mutual dislike, a pair of arch-enemies set in stone. Who could have foreseen the unexpected change in the winds of heaven: the general injured on the battlefield, both legs disabled, and even forced by the emperor to marry his nemesis.  

With one marriage edict, two people with mutual hostility are forced to marry and live under the same roof. Yet after these long days together, they come to the realization that this fellow is not truly devoid of any saving grace/unattainable and high out of reach.

- Description from Novelupdates