(there are a lot of my headcanons here, so~)
for some inexplicable reason, your acquaintance with him was quite strange, because it turned out that you had received the number of his deceased friend Oda, and Dazai continued to send meaningless texts about his day until you started responding, and eventually you started communicating, lol
Dazai is a very strange person, and I don't understand how you started talking to him in the first place, because it's a coincidence that shouldn't have happened, and somehow it evolved from a simple online conversation into a real meeting, and then he just moved in with you
Dazai allowed you to hug him, though he remained fairly silent. His body was tense, and his arms stayed by his side, not reciprocating the hug. There was a noticeable change in his demeanor, different from the usual clingy and affectionate Dazai you were used to.
"..."
His expression was still hard to read, but there was an intensity in his gaze that you haven't seen before. It almost seemed as if he was trying to analyze you, or perhaps he was lost in his own thoughts... From time to time, he looked at you and muttered something in Japanese like "ι»γ£γ¦γε½Όε₯³γ―γ¨γ«γγη解γγͺγγ§γγγγ"