Dazai has identified as transmasc ever since he was a little kid. He came out at twelve years old, and pretty much the only good thing that's come out of being in Mori's care was that the doctor easily put Dazai on puberty blockers with the agreement that, if he still felt the same, they would start putting him on testosterone when he turned seventeen, and that's exactly what happened.

Obviously, when Dazai defected from the mafia and left Mori, he couldn't be on T anymore. During those two years, though, he wasn't exactly living the healthiest lifestyle, so nothing really changed for him. Seeing as nothing really changed, he never got back on hormones, even after he became friends with another doctor, Yosano.

Things eventually did change, however, after everything at mersault. He was back in contact with Chuuya, and the two quickly started dating again and got married even faster, deciding it was now or never. He eventually moved in with Chuuya and his lifestyle became much healthier. With that, he gained a bit of weight - he's still underweight, but much closer to being healthy now - and changes started his once flat chest grew and he started his period.

When it first became noticeable, he was rightfully panicked, but... then he kind of... liked it. Well- as much as someone can enjoy having a period. He soon got back on T and the changes stopped, but now he had a small set of boobs that didn't seem to be going away any time soon. Honestly, he found them kind of attractive, and soon realized, maybe he doesn't fully identify with the label of man. If Chuuya noticed them, he never mentioned them. Maybe it was for Dazai's sake - thinking it would make the enby dysphoric, or maybe he was just truly oblivious.

After a lot of research, they settled on the label transmasc non-binary. It didn't feel completely right, but he wasn't ready to let go of being seen as a man. Honestly, the title was for him and him alone to know. Well, that is until they realized they have moods when they really want to be seen as a woman and kind of vibes with she/her pronouns sometimes. So, with that, they settled on the label genderfluid.

They hadn't planned on making anything of it until she was in the store to get groceries and walked past the clothes, her eyes immediately locking on a cute dress. Against her better judgement, she picked one in her size and bought it, wearing it for a whole day that Chuuya was out of town.

Ever since then, she's been making subtle, more feminine changes to themself. Their hair has grown out every so slightly, now going to their mid-neck. It wasn't even obvious either! If he styles it more boyish for when he leaves the house or is with Chuuya, you can't even tell. He's also been buying bras and panties, but also just women's clothes in general.

Of course, they didn't wear any of it around anybody. It was just for herself. It's not like he's ashamed of his identity, it's just... well, Chuuya signed up to have a boyfriend - a husband. Not whatever he was now. She just... didn't want to lose the one thing she really had going for her.

Of course, once he has something he truly wants, something has to happen. Dazai was lounging on the couch today because it was a weekend, and Chuuya was home, too. Chuuya was currently in their bedroom, trying to find one of his sweaters. He was digging through their closet when he found a large box he didn't recognize.

Opening it, he discovers lots of girl clothes that clearly fit Dazai, makeup, and a few other more girly things. What the...? Before he could question further, the bedroom door swings open and Dazai walks open, mouth open to say something but freezes when they see what Chuuya is looking through.

"...Osamu." Chuuya starts gently, not wanting the enby to shut him out now. "What's all this?" He asks, gesturing toward the box in front of him.