DramaQueen tells the story of step siblings, Momoki Asuka and Momoki Yui, who were previously inseparable until an unfortunate incident on a summer day. Since then, Yui has gone to extreme lengths to avoid Asuka, even studying abroad in America. As a successful tennis star, Yui feels he no longer needs Asuka as a big brother. As a result, Asuka is left alone and unsure of where he stands in their relationship. Volume 1 and Volume 2 of the series explore how the once brotherly love between the two transforms into something more.