When Junichi ‘Gene Killer’ Nagase saved the beautiful and wealthy Yuuhi Katagiri from bullies one day, he had no idea that he’d actually assisted his would-be wife! For what Junichi didn’t know is that he and Yuuhi’s fathers decided they would be wed, and Yuuhi has arrived in his town to decide if her betrothed is good enough for the job. After a humiliating and unwanted first kiss, Yuuhi moves in with Junichi to evaluate his worth; and thus, Junichi’s life is changed forever. With embarrassing situations at every turn and a bride-to-be that thinks he’s uncivilized and brash, what’s a guy to do?
On his way to school Junichi Nagase saves a girl from danger. Later due to a misunderstanding he kissed her. Shocked and disgusted, and without understanding what just happened or why, she screams at him and tells him to “just die!” As it turns out, the girl, Yuuhi Katagiri, is a new transfer student and, much to the surprise of Junichi and his younger sister Minato, their father arranged for Yuuhi to be Junichi’s future wife! Of course, getting married to “that perverted idiot” is the absolute last thing Yuuhi wants! Junichi’s crazy school life with his tsundere bride-apparent has begun!