Zenmetsu End wo Shi ni Monogurui de Kaihi shita. Party ga Yanda.

Wolka, a reincarnated adventurer, once lived an ordinary life in Japan. But in this world of swords and sorcery, his existence is anything but peaceful. While delving deep into a treacherous dungeon alongside his party, they are ambushed by an abyssal monster of overwhelming power. In a desperate bid to shield his comrades, Wolka is grievously wounded, his life hanging by a thread. On the precipice of death, a horrifying revelation dawns upon him: he is not a hero, but an insignificant background character in a dark fantasy manga he read in his past life, destined to perish alongside his entire party in a grisly "annihilation end." Driven by a visceral hatred for such grim conclusions, Wolka refuses to bow to fate. With sheer desperation fueling his battered body, he performs a miracle, slaying the monstrous beast against all odds. The victory comes at a terrible price—he loses an eye and a leg—but the relief of overturning his predetermined demise is overwhelming. However, his struggle for survival has ignited a flame he cannot control. Since that fateful day, the women of his party have undergone a disturbing transformation. Their once-supportive gazes now cling to him with suffocating weight, and their words drip with a dangerous, obsessive devotion. "I'll protect you this time, so please don't leave me..." "I'll always stay by your side, senior—okay?" "I’ve already decided... if it’s for your sake, I’m ready to die." This is the story of a reincarnator who clings to the belief in absolute happy endings, and the heroines whose love for him has spiraled into a perilous fixation. For Wolka, the battle to survive was only the beginning—the victory that was meant to bring peace has instead plunged him into a different kind of abyss, a nightmare born from the very protection he fought so hard to ensure. His terrifying ordeal of 【Emotional Descent】 has only just begun.