After Takatsukasa Hikaru lost her father, the one who agreed to become her guardian was Kuzukiri Kiyomizu, a calligrapher who was adopted by the Takatsukasa family. Although apathetic and non-expressive at first, Hikaru becomes drawn to Kiyomizu who is concerned for the seemingly cold girl and aims to become Kiyomizu’s wife?! What will be the outcome of their all-too-casual proposal?! The start of a chaotic cohabitation between an older tsundere and unfortunate beauty!