[The blurb may change, but the premise won't.]
A little demon who feeds on lust accidentally transmigrates into an action and mystery shonen manga, where a group of hideous curses mistake him for one of their own.
Agatsuma Yuka: ...Who are you calling one of your kind, you ugly weirdos?! Don't all crowd around me like that!
Damn it!! I transmigrated into the wrong manga! I was supposed to end up in one of those NTR reverse-harem stories!
To fill his stomach, he immediately pounced on a passerby, ready to enjoy a hearty meal. "Time to eat~"
Teen Gojo: ...Huh? What kind of strange creature is this?
*
Geto Suguru noticed that his best friend had been acting strangely lately. He often disappeared, vanishing as soon as class ended, and his dorm room was locked tight, with strange cries occasionally coming from inside.
Geto narrowed his eyes and said mildly, "I have a feeling Gojo's hiding something."
"If you're that curious, go take a look," Ieiri Shoko said around her cigarette. The two immediately agreed.
They secretly followed him, and at a corner they saw a pink-haired boy being led along by a leash. Their close friend and classmate came over without any attempt to hide it. "Geto! Shoko!"
"I was going to introduce you two in a little while. This is my new puppy. Cute, right? Say hello!" Gojo Satoru walked over with the leash and scratched the pink-haired boy under the chin.
Agatsuma Yuka's eyelids drooped, and he said lazily, "Hey, guys."
Their pupils contracted, and their expressions turned complicated. "If you've been kidnapped, just nod. We'll call the police and get this bastard arrested."
Agatsuma Yuka: "No, I'm here willingly."
He ignored their even more sympathetic looks. Only an idiot would send this sucker to the police station. Gojo Satoru gave him money and a place to stay for free.
And most importantly, Gojo Satoru had promised to find him ten men and let him choose.
*
...How could he have believed that ridiculous story? If he was counting on a pure-hearted teenage boy to find him a partner, he'd be stuck in this shonen manga for the rest of his life.
There were plenty of high-quality meals around him, too, but Gojo Satoru drove them all away.
Agatsuma Yuka had had enough of only being able to look and not eat. In the middle of the night, he ran away from home and went to a host club, planning to turn his sorrow into an appetite.
Fushiguro Toji, who'd been tricked into coming along, scowled. "I don't serve men."
Agatsuma Yuka immediately bristled, and the two started fighting.
The door was kicked open with a bang. Gojo Satoru watched them tangled together in an ambiguous embrace, his expression dark and his voice cold. "What are you doing?"
What Fushiguro Toji thought: Fighting.
What Agatsuma Yuka thought: Eating.
What Gojo Satoru thought: Something indecent.
*
Starving Agatsuma bit his handkerchief and eyed the curses around him, entertaining a wicked thought. "Nonhuman?"
The curses shivered and looked around. !!
Agatsuma Yuka shook his head hard, coming to his senses. "No!! That's my line in the sand!"
To keep from starving to death, Agatsuma Yuka tried all kinds of ways to find food. Then the story he posted went viral overnight, and he was so full he could barely walk. He'd never have to worry about going hungry again. "Human desire is terrifying."
Even a succubus would get its fill and take some home in a doggy bag.
That night, Gojo Satoru patted the king-size bed, making a coy, suggestive gesture. No, at this point, it was practically an outright proposition.
Agatsuma Yuka's face was expressionless. "Not interested."
Reader's Guide:
1. The protagonist has questionable morals, believes in the survival of the strongest, and puts pleasure first. He is not human.
2. The protagonist has no shame and a very unusual way of thinking.
3. Given Jujutsu Kaisen's bleak casualty rate, everyone gets to kick their death flags away. This story takes a lot of liberties, and curses obey the protagonist unconditionally. Logic and reason don't apply; it's all pure buffs.
Theme: There's always a way to overcome difficulties