Danshi dato Omotteita Osananajimi to no Shinkon Seikatsu ga Umaku Ikisugiru Ken ni Tsuite  

男子だと思っていた幼馴染との新婚生活がうまくいきすぎる件について

Shuichi Konoe will soon wed Yuka Karasuma, his childhood companion whom he initially believed to be male when they were young. Despite their comfortable familiarity with one another as best friends, they are both beginning to sense a growing attraction towards each other beyond friendship.

Danshi dato Omotteita Osananajimi to no Shinkon Seikatsu ga Umaku Ikisugiru Ken ni Tsuite began as a web novel on Shousetsuka ni Narou and Kakuyomu on June 18, 2021. Kadokawa has released a revised and illustrated version of the series since April 1, 2022, under its Kadokawa Sneaker Bunko label.