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

Synopsis

A confusion made in childhood leads to a surprising yet beautiful relationship in this sweet romance manga. Shuichi and Yuika have been close friends since they were kids. But Shuichi had always thought Yuika was a boy, so their reunion 10 years ago was filled with surprise when Yuika had seemingly transformed into a beautiful young woman! Intimidated by his friend’s beauty, Shuichi was sure this would be the end of their friendship. And it was… because the two traded in friendship for marriage! A sweet and charming love story about finding friendship and love with your person. (Source: Seven Seas Entertainment)