"rouhou" ore no iinazuke ni natta jimiko ie dewa kawaii shikanai.
【朗報】俺の許嫁になった地味子、家では可愛いしかない。 地味かわ
Eng: "My Plain-looking Fiance is Secretly Sweet With Me."
A light novel series. It began as a web novel on Shousetsuka ni Narou on October 18, 2020. The first print volume was published on February 2, 2021 by Kadokawa under the Fujimi Fantasia Bunko label.