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

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.

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—?

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…!?

In the vast continent lies the prosperous Kingdom of Granzear.
However, a war with the Demon Lord’s army has broken out,
and more than ten years have already passed.
In this era, a ray of hope that could change everything emerges—
those who bravely rise up to defeat the Demon Lord…
They are known as the Heroes.
People from all walks of life, carrying different emotions and desires,
receive a divine blessing and set off on their journeys as Heroes.
This is the tale of one such Hero,
a journey spun by someone with boundless kindness.
A story never sung by bards or praised by the masses—
an ordinary, uneventful, yet singular truth.

The most powerful succubus, who gained immense power through a mutation and even killed the previous demon king. Her magical powers and pheromones are so powerful they could reach the divine realm, and she plots to rewrite the world itself with the laws of incubus. She's the final boss, exploiting the protagonist's subconscious to launch mental attacks. No man can resist her titty fucking with her outsized breasts.