At the center of this tale is Sakaki Yuuto, a high schooler of 17 years who finds himself in an uncommon line of work - he breaks up couples by winning over their female partners. However, despite being physically attractive, he falters when it comes to winning over women. His younger brother is the one who pursues his male targets, and his older brother is the one who guides them from behind the scenes. Will Sakaki play his role effectively and seduce his intended targets? And, more critically, will he adhere to the topmost principle of the 'Breakup House' and avoid falling in love with those he is targeting?