Though hesitant, Miyo Saimori decides she is finally ready to attend a party with her fiancé Kiyoka Kudou. She has been practicing the etiquette needed for such an occasion with the help of Kiyoka's sister, Hazuki. At first, Miyo feels pressured by all the attention she receives; however, she eventually grows used to the unfamiliar environment and makes new acquaintances. Through these encounters, Miyo learns more about her family's past and the significance of creating connections with others.

Watashi no Shiawase na Kekkon: Watashi no Shiawase na Katachi was bundled with the special edition release of the eighth volume of the Watashi no Shiawase na Kekkon light novel.