Tenkousaki no Seiso Karen na Bishoujo ga, Mukashi Danshi to Omotte Issho ni Asonda Osananajimi datta Ken

Seven years ago, before my best friend and I were torn apart by a big move, we promised we would be friends forever, no matter how much distance was put between us. But when I finally found him again at my new high school, I didn’t expect him to be…the most beautiful girl I’ve ever seen in my life. Wait, so does this mean he—or, I guess, she—was a girl this whole time?! It’s honestly insane. With everyone else, she’s a pristine flower, literally Miss Perfect. But when it’s just us, she’s the same goblin I’ve always known. I guess some things truly never change. And yet… (Source: Yen Press)