A Hentai System in the World of Danmachi - Chapter 5 - 4 - That’s fucking good. +18

After dying prematurely from an incurable disease, Yuka Hikano finds himself in a mysterious realm filled with endless doors, each concealing divine gifts from powerful deities. He is not alone—others who have met the same fate of death stand beside him, unaware of the trials that await.They are put through various tests and eventually transmigrated into different worlds. But these worlds are nothing like the Earth they once knew.For Yuka, however, this apocalyptic world feels eerily familiar. It is a realm of endless war, devastation, and chaos—a world he once played in a game. Certainly not the kind of place one would wish to be reborn into.From infancy to adulthood, he must gather strength, knowledge, and allies to survive the horrors that lurk ahead. But when he awakens a system granting him a power beyond imagination, he soon realizes that blessings can also be curses.[You have gained Infinite Mana.]Infinite Mana...?What could possibly go wrong?

“Send me to the past.” That’s how the first step toward revenge began.

Drowned, betrayed, and humiliated—Brandon’s life ended in the most pathetic way possible. But when he opened his eyes again, he was no longer Brandon.Reborn as Noah Weaverheart—in a novel he had read—the spoiled yet talentless son of a duchess, he quickly realizes a cruel truth: he’s nothing more than a stepping stone, fated to die in the first 30 chapters of this world’s story.But fate isn’t set in stone.Because he now has the Sovereign Bond System, a power that allows him to share everything from the women he bonds with—but at 10,000 times the quality.—[Ding! You have bonded with Neko Neko.][Ding! You have shared the affinity and talent of Neko Neko.][Ding! You have obtained the affinity: Ice (SSS rank) and the talent: Sovereign of Ice (SSS rank).]Noah’s lips curled into a knowing smirk.If this world wanted him to be a stepping stone, then he’d crush the so-called protagonist, steal his harem, and rewrite destiny itself.

Akira Kitagawa, a quiet and unremarkable second-year high school student, has come to accept his lonely, mundane life after losing his parents in a tragic accident. No friends, no excitement—just peaceful monotony.Until one day… a girl literally falls from the sky.Sera Rymer, a fiery and seductive mage from a world of magic, crashes into his life—naked, powerful, and completely confused. Bound by an ancient pact of Master and Slave, she must now live under Akira's roof, turning his boring world into a whirlwind of magical chaos, awkward steam-filled encounters, and otherworldly drama.From laundry mishaps involving spells to battling demonic pursuers from Sera's realm, Akira's once dull life is now anything but ordinary. But as their bond deepens, secrets unravel—and the “God” behind it all might have very different plans.Can a lonely boy and a wild mage girl find meaning—and maybe even love—in the absurdity of it all?Tagline:When magic crashes into your mundane life, expect steam, spells, and soul-binding surprises.Tags:Romantic Comedy, Fantasy, High School, Ecchi, Magic, Isekai Girl, Master-Servant Pact, Slice of Chaos, Slow Burn Romance, Fanservice, Opposites Attract, Everyday Magic, Harem (Optional), Steamy Situations, Lighthearted Drama, Tsundere Heroine