A straight guy transmigrates into an ABO aristocratic academy, but he doesn't know it. He thinks it's just an ordinary boys' school.
It's just that this boys' school is a little weird.
Some people act as if their eyes are on top of their heads, unbelievably arrogant.
Some are cold and heartless, brilliant to a fault, but terrible at communicating.
Some are always crying and muttering about strange things.
Straight guy: "They all have their flaws, but that's okay. We're all good bros!"
ABOs: "..."
Damn it, can someone make this clueless commoner understand that we're trying to court him!
Many years later, the straight guy is interviewed and suddenly looks horrified.
"My bros and I share a bed, eat together, bathe together, and shop for furniture together. Is there something wrong with that?"
The reporter hesitates, then finally says, "You guys should just get married."
An unbelievably oblivious, career-minded, muddleheaded bottom x an equally oblivious, aloof top with a wonderfully strange way of thinking.
The blurb will probably be like this, but the premise won't change.
Theme: Pay attention to your inner self and don't worry about outside influences. That's the way to live happily.