No Jae-Min Zone

Middle school student Han Si-U is enjoying a perfectly normal romance with her boyfriend, Park Geon-U. However, their relationship takes an unexpected turn when Geon-U’s next-door neighbor, an elementary school boy named No Jae-Min, accidentally catches the couple sharing a kiss. Utterly horrified by the sight, Jae-Min immediately declares war on Si-U’s love life. From that day forward, he relentlessly shadows her every move, loudly demanding that she break things off with his beloved older brother figure. Si-U is left completely bewildered by this sudden hostility. The sweet, affectionate child who used to trail after her while cheerfully declaring how much he liked her boyfriend has vanished entirely. In his place stands a pint-sized menace fueled by pure indignation, determined to prevent anyone from taking Geon-U away from him. What follows is a chaotic and comedic daily routine filled with constant bickering between an exasperated Si-U, who simply wants to date in peace, and a fiercely territorial Jae-Min, who views her as a threat to his favorite person. With outrageous outbursts echoing through the neighborhood, Si-U must figure out how to navigate her first real romance while fending off the most unlikely rival imaginable.