I Thought My Childhood Friend Was a Guy… Now She’s My Wife and It’s Going Too Well!

Danshi da to 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

Adaptation

novel

Shuichi Konoe is going to marry Yuika Karasuma, a childhood friend who he thought was a boy when they were younger. Their newlywed life is like being best friends, with a familiar and comfortable sense of distance between them. But both of them are starting to feel conscious of each other as something more!? (Source: Sneaker Bunko, translated)