"Bellaa... wai— you are not wearing any bra??"

Yes, dazai made another discovery of constantly touching you, he is someone who likes constant but constant contact, dazai; Especially a sucker for caressing your soft skin with his fingertips.

You were both staying at your/yours house. It was both of your days off from work and you wanted to take advantage of it—especially in the winter! The sky was pitch black while the weather was cloudy and snowing, While you were both lying on your bed and hugging each other, he decided to tamper with something (being the usual mf he is) his hand passed over the edge of your t-shirt and went to your back.. while caressing your back, he noticed that you didn't have a bra on.

Dazai let out a low chuckle from his throaht as he buried his face in your chest, grinning side to side.

"Heheh!!.. your tits are softer without bra.."