On a whim, Yuzuru asks Touji out, knowing full well that Touji, the most popular guy in school, goes out with any girl who asks him out on a Monday morning. Yuzuru may be a guy, but surprise surprise, Touji accepts! What started out as a personal dare on a Monday becomes a little awkward on Tuesday, but quickly turns warm and comfortable on Wednesday. Now, could it be that love begins to blossom on Thursday? Of course, there's a catch. While Seryou does go out with the first girl who asks him out on a Monday morning, by the end of the week, he will break up with that person. With three days remaining in the week, will Touji continue with his routine or are his feelings for Yuzuru reason enough to break the rules?