I'm Gonna Serve You 4

The story takes place a few days after you surrendered to Alice and became a true slave.
You are immediately ordered to give money to Alice.
The deadline is that night. You must earn the money by then. A
lice tells you to earn it by doing anything, even robbery, but you choose to collect magic crystals, which can be turned into money.
When you are unable to earn enough money, Alice gets angry with you.
First, she gives you a footjob while extorting money from you.
This trains you to associate giving money with the pleasure of your penis.
Little by little, she brainwashes you into being willing to kill someone for Alice.
And then it's time for your punishment.
She smears cheap makeup she has bought sloppily on you, and finishes it off with bruises caused by Alice's beatings.
You are instilled with the fear of not being able to disobey Alice's orders.

Ishidou Narumi, a student attending a rural all-boys' school, spends his noisy but enjoyable days with his slightly ditzy best friends.
He has a "secret" that he has not made public.

In this all-male school is a popular, gentle health teacher named Mitama, who seems to be the human embodiment of healing.

Another one is Aya, his homeroom and chemistry teacher, who is feared because of her sharp eyes and strict attitude, but is also popular because of her model-like appearance.

As the only ladies in a school with no female students, these two women and Narumi have a "special" relationship that they do not tell anyone about.

Although they act respectable at the school, it's all just a facade. The truth is that one is a spoiled, no-good Oneesan, and the other is a timid worrywart born with a bad look in her eyes. Since he happened to know those sides of the girls, Narumi has developed a particularly close relationship with them.

However, they were still teachers and student. No matter how close they were, there was a line they would never cross. But the situation changes drastically when an enfant terrible named "Patricia" enters the picture.

Patricia (aka "Patty"), arriving as an English teacher, falls in love at first sight with Narumi after a certain incident. Being a bundle of energy, Patty quickly makes a move on Narumi (in a naughty way)...
From there, his relationship with Mitama and Aya begins to change.

Who will win this sudden battle?

Mitama, the pampered Oneesan?
Aya, with the face of a wolf but the heart of a rabbit?
Or Patty, rushing headlong into everything like a wild boar?

It all depends on Narumi's lower half...?

Terutoshi awakens a spirit when he kills a baby bird on the way to school. To right the wrong and fulfill its dream of growing up and bearing offspring, the spirit curses Terutoshi with a task: to impregnating another person. Branded with the spirit's seal, his best and only choice now is to fornicate with Ms. Sayumi, his teacher.
But there is a special effect of the curse: when Terutoshi thinks of any erotic act, he becomes transparent!!
To regain opacity he must travel the campus unseen to target Sayumi, having sex with her during class, during breaktime, and so on!

They Get Stronger Every Time They Drain You! Retrain Five Hopeless Succubus Girls Through… SEX!?
You want me to retrain FIVE utterly hopeless succubus girls!?
The name’s Glenn Magna. I’m an S-rank adventurer who’s cleared countless high-difficulty quests—and to put it bluntly, I’m a man who’s been through a lot. Time and time again, I’ve been saddled with impossible quests under the lame excuse that "You’re the only one who can do it!" After years of being everyone’s errand boy, I finally hit my limit.
"Isn’t there an easier way to make a living...!?"
That’s when inspiration struck. Instead of being the one doing the grunt work...
"Why not become an instructor and raise a party strong enough to do it for me?"
While continuing my career as an adventurer, I started working as a guild instructor. But one day, the Guild Master handed me the most ridiculous request yet.
"Please... just do something about those girls!"
The party he assigned to me consisted entirely of succubi—and they were a complete disaster. Terrible with swords. Hopeless with magic. They’re so incompetent they’ve never even managed to clear a beginner-level quest. They’re the most spectacularly useless party of succubi anyone has ever seen.
But succubi possess one unique racial trait. By using their “Semen Absorption” ability, they can absorb highly concentrated life essence through naughty acts, dramatically boosting their individual power.
And, by an incredible stroke of luck... (or terrible luck?) I just so happen to possess an incredibly rare body overflowing with the highest possible concentration of life essence.
"Instructor Glenn's... semen... it's incredible...!"
"To think... it can become our strength...!"
Train them through SEX. Fight through SEX. Deepen their bonds through SEX.
Can this hopeless band of succubi grow into a legendary adventuring party?
The goal is simple: Raise an elite team capable of handling dangerous jobs on their own!
Until then, the legendary adventurer's hardships are far from over...

"I finally finished my overtime work! "
Having finished the overtime work imposed on me by the power-harassing manager, I rewarded myself with a night out on the town. When I arrived at the hotel district and strolled around in circles...
I couldn't believe that I would see my senior in the same department in such a place. My curiosity kicked in, and I keep distance to check on Remi. After a while, someone approached her.
The person Remi was waiting for was that power-harassing department head! I took out my phone and recorded until the two disappeared into the hotel. Then, as I looked back at the footage I had taken, I began to formulate the worst possible plan.
"This is it... I'm going to do it... hehehe..."