Iroe Genma, a high school senior known as 'Elder Sister' for her petite stature, leads the Model Club at her school. This mischievous student, along with her two junior members – the fiery Hazuki 'Okappa' Okamoto and the logical Makina 'Makimaki' Sakamaki – tackles the club's primary task of constructing plastic models, ranging from cars to robots. Despite their best intentions, the trio often veers off course, entangled in internal conflicts and comical escapades like navigating club rivalries and mastering the art of love confessions. Watch as these three spirited schoolgirls dive headfirst into a whirlwind of eccentric and hilarious scenarios!