It takes seven days for first-year high school student Touji Seryou to decide if he loves someone. He has a reputation at school for dating whoever asks him out on Monday and breaking up with them by Sunday, claiming he cannot return their feelings. Despite this, girls keep asking him out because, during that one week, Seryou treats them with complete sincerity. Yuzuru Shino is Seryou's good-looking senior in the archery club, who always gets dumped once his partners realize his unpleasant personality. After hearing the rumor about Seryou, Yuzuru runs into him by chance at the school gates and asks him out as a joke. To his surprise, Seryou takes the offer seriously. How will their week-long relationship unfold?