Yuuki Narito, by an unfortunate twist of fate, ends up seated beside the notorious Yui Takatsuki, known for leading guys on and then rejecting them, earning her the title 'The Seatmate Killer.' Despite her schemes, Yui underestimates Yuuki's obliviousness. The dynamic shifts when Yuuki, typically clueless, decides to challenge Yui. As the tables turn, Yui, once the predator, becomes the prey. A heated rom-com unfolds with a resolute Yui now seeking revenge, setting the stage for a tumultuous and entertaining tale.