“Never, under any circumstances, fall in love with the protagonist.”

The Dimension Management Bureau is an organization dedicated to maintaining balance across worlds by preserving the integrity of original stories.

One of its employees, Herace Schule, is tasked with resolving an unprecedented anomaly—one that hasn’t occurred in a thousand years—by entering the male-oriented fantasy harem novel, ‘The Black Sheep Swordsmanship Genius of a Magical Family.’

However, every time he crosses paths with the protagonist, Luke, things spiral out of control in the most unexpected ways.

“Dammit! If you touch me, I’ll kill you!”

“I’m not touching you! I swear I won’t!”

“Crazy bastard! Stop it! Get lost, you son of a—ugh!”

It’s bad enough having to witness the protagonist, sold into slavery and drugged into a state of arousal, panting helplessly.

“Don’t sell me.”

Then there’s the moment when the protagonist, pretending to be a villain, suddenly orders him around.

“Hey, don’t you want to sleep with me just this once?”

What’s with this guy?

Instead of building a harem, he’s making moves on another man.

Isn’t this supposed to be an all-ages fantasy novel?

How did it suddenly turn into an R-rated story?

The most important rule for preserving the original story:

Do not fall in love with the protagonist.

But… what are you supposed to do when the protagonist says he’s falling for you?