Chaos;Child

The full English patch was just released: CHAOS;CHILD PC English patch
 
It's currently not available on any site besides DMM.com for 7344 yen/ 66 USD.

The Queen is cruel. The court is corrupt. And the goblin in the dungeon? He’s about to flip the castle upside-down.
 
A Court of Chaos is a short, adult visual novel that trades sprawling storylines for pure, escalating humiliation. Play as Briggs, a lowly goblin with a grudge, who teams up with the queen's bitter court to unravel the Queen’s dignity — one prank, hex, and "wardrobe malfunction" at a time.

The protagonist was born to a human father and a succubus mother.
His parents kept his half-human status a secret as he was raised as a human, until the night of his coming-of-age birthday, his mother was kidnapped by a mysterious succubus.
The protagonist takes on the “Trial of Courage” to get his precious mother back, and on the way, various succubus temptations await him… This is the story.

It began as a day just like any other.
A dull morning, an uneventful trip to school, an afternoon of tedious lectures...
And then I met her.

"I'm an angel, sent here from Heaven on a very important mission."

She appeared suddenly, and without warning―a beautiful girl who called herself an angel.
Spreading her large, snow-white wings, she made a declaration that would forever change my life.

"I come in search of the Demon Lord's reincarnation."
"That being you, Tanikaze Riku."

That's right, apparently I was a Demon Lord in my previous life. From some other world to boot.

Unfortunately for me, the anarchy wouldn't stop there.
Memories from a previous life, visitors from another world... It was just one crazy, chaotic event after the other.

"Wait, what? But that doesn't― Huh?!"

Thus began the story of Tanikaze Riku, a tale marked by the loss of his normal life, along with so many other precious things.
Aside from even more anarchy, what else does the future have in store for him?

Girls are swarming. His pheromones are pumping. His dick is locked and loaded.
What could possibly go wrong?
Hikaru, a hopeless virgin desperate to finally lose it this year, heads to the beach!
But there's one problem: he thinks saying “I’ve got a huge dick” is a great pickup line.
Naturally, it goes terribly. Not a single girl is into this awkward guy reeking of virgin energy.
That night, he receives a shady letter and a drink from someone calling themselves the “Virgin Savior.”
“Drink this and you’ll be overflowing with pheromones. Women won’t be able to resist you.”
Feeling mocked, Hikaru chugs it all—and the next day, a transformation begins.
Suddenly, his scent is driving girls wild.
From savage gyarus and tanned lifeguards, to cheating girlfriends and exhibitionist college girls...