If only I got transported to another world like in those cool anime series – is what Kai Martin thinks when Milo, his best friend, suddenly confesses and asks him out.

Next thing he knows, he's in a huge bed, in what looks like royal chambers, and there's a handsome naked guy next to him. Who glares at him and asks him something about another round.

Another round of what?

And then, a guy in butler's livery walks through the door and looks at him like he just spat in his food.

On the other side of the universe, Prince Sebastian finds himself in a conundrum of his own. A commoner with beautiful eyes asks him out on a date. What's a date? Ah, and there's also that thing about a curse, as it looks like he just got thrown into a cruel world full of dangers.

In other words, this is a story about a NEET who learns what responsibility is while trying to fight monsters, fend off the advances of his personal captive-prince-slash-sex-slave, and figure out why nobody likes him. It's also the story of a prince with a stack of chips on his shoulder who learns that having feelings is not all that bad.