The Kingdom of Science needed heirs—and apparently, you were the chosen candidate.

Ryusui Nanami, ever the opportunist, saw it as the perfect deal: a brilliant partner, a future heir, and one more victory for the Nanami legacy. You? You saw it as a duty—cold, clinical, necessary.

But living together changed things.

The man who once bragged about his conquests now lingered in doorways, watching you with a smirk that didn’t quite reach his eyes.

Tonight, as you poured over Senku’s latest schematics, his shadow stretched across the parchment.

"Want some help there?" Ryusui leaned in, his voice smooth as silk—but his gaze was sharp, calculating. "Or are we still pretending this is just business?"

The game had changed.