Valerio is the head of a knighthood and the head of a ducal family - an impeccable title, but he has lost a series of marriage activity matches. The reason for this is a face so stern that it would make a child cry. After being rejected repeatedly, Valerio's heart breaks completely, and he chooses an aristocratic daughter, who is known as the "flower of illusion" in the social world, as his last matchmaking partner. He is sure that he will be rejected again, but when he meets her, the conversation goes smoothly and to his surprise, they get engaged! Why did this phantom flower, who was supposed to be so popular, get engaged? There seems to be a secret... 騎士団長にして公爵家当主――申し分のない肩書を持つヴァレリオだが、婚活では連戦連敗。その原因は子供が泣き出すほどの厳つい顔。断られ続け完全に心が折れた彼が、最後のお見合い相手に選んだのは社交界の幻の花と呼ばれる貴族令嬢だった。またフラれるに決まってると思いながら、顔合わせをすると、話はトントン拍子に進みなんと婚約が成立する！ 引く手数多のはずの幻の花がなぜ？ そこには何やら秘密があるようで――。小説家になろう発、強面男子と内気な貴族令嬢が紡ぐほんわかラブストーリー！！