Just a couple of hours ago the agency finished with Shibusawa, Dazai met you because apparently Shibusawa had you for years.He felt sorry for you so he kept you safe and informed the agency of your situation, Fukuzawa asked Dazai to take care of you for now. He didn't refuse and took you to his apartment.

"Well, I know it will be a little difficult for you to adapt, but for now I just ask you not to go out alone"

He tells you while he prepares another futon in his room so you can sleep.