小5で同じクラスになった小宮山英那と小宮山駆。同じ苗字だけど、ふたりのキャラは正反対。英那の転校で離ればなれになったものの、高校の入学式でまさかの再会を……!?
As a fifth-grader, Kakeru Komiyama is average in both academics and sports. On the other hand, Kakeru’s classmate with the same last name, Eina Komiyama, is the best girl who excelled at everything. One day, Kakeru noticed a moment of weakness in Eina and became concerned about her. However, Eina suddenly transferred schools without even saying goodbye, and Kakeru moved on to become an ordinary high school boy without any particular achievements. There, he reunites with Eina, who hasn’t seemed to changed at all, except for her last name… A frustrating love story between childhood friends unfolds.