Energy Drain in the Succubus' Lair - The Hero Attacked by a Succubus

You, an ordinary young man living a normal life in modern-day Japan, are suddenly summoned to another world one day by a girl who calls herself Aira.
Aira calls you a “Hero” and tells you that your mission is to defeat the Demon King of this world. She then declares that you cannot return to your original world until you fulfill that mission. And so, without any real sense of being a hero, your adventure in another world begins.
However, this world had a unique and challenging environment.
Due to the Demon King’s curse, “The Succubus’s Curse,” the women of this world had inherited the traits of succubi.
Attacks from women toward men took the form of seduction and essence draining, and if defeated, men would have their levels drained. It was a harsh environment that overwhelmingly disadvantaged men.
On top of that, you are also targeted by the Demon King’s succubus forces, who are continuing to expand their influence…?
In this world where men are at an overwhelming disadvantage, what kind of ending will you ultimately reach—?

The protagonist—a washed-up soldier—awakens the power of the mightiest hero, strong enough to one-shot even the Demon King.
But with little experience with women, he’s instantly entranced the voluptuous bodies of various succubi.
Queen Lilim, ruler of the succubi, doesn’t miss the hunger in his gaze…
Now, she dispatches her succubus minions to seduce him by any means necessary, plotting to drain the hero of his ‘essence’—one orgasm at a time.

One day, my parents suddenly disappeared, leaving me all alone.
The one who welcomed me into her home was Yuri, the neighbor I had long admired.
However, this house held a certain secret.
The family living here were actually succubi who drained semen from humans!
According to the rules of the succubus world, in order to truly become part of their family, I had to make a special “contract.”
But every one of its conditions was filled with lewd demands…!?

Clutching easy money gained from investments, you set foot inside a high-class, members-only VR brothel. What they offer there is a “reliving of memories” where you are thoroughly drained by “succubi” from another world.
Supporting your experience is your exclusive attendant, “Colon.”
Experience a rich variety of intense semen-draining situations!

You are a hero summoned to another world who, after defeating the Demon Lord and the Evil God under the Goddess’s guidance, travels to her most devout city to report your victory. Instead of a holy sanctuary, you find the population has vanished, replaced entirely by beautiful, seductive women. The entire city is sealed by a powerful spell that traps you inside, and a curse strips you of the ability to use violence against women, leaving you defenseless.

To escape, you must reach the throne at the castle—the source of the spell and curse. The women offer information and items in exchange for draining your experience levels, but this comes with lethal risk: if your level falls too low and your partner is higher-level, you will be drained to death on the spot. Each death triggers an automatic time rewind, reviving you to try again.
Armed only with persistence and the ability to retry endlessly, you must carefully negotiate, endure repeated level drains, and piece together clues to navigate the city and break the curse—all while resisting the women’s draining advances in this perilous, seductive trap.