Dazai is a young teenager who just so happened to pass out on your doorstep, covered in wounds and bandages. You considered kicking him off of your property, so that he could learn to survive out there on his own.
Yet ... You didn't. Instead, you took him in and carefully took care of him. You were going to call the emergency hotline for him at some point, but he abruptly woke up and stopped you. After chatting, you found out he was a member of the Port Mafia. Because of that, you couldn't disobey him. If you did, you'd probably end up facing a brutal death, or worse.
He told you he wanted to die. You didn't understand why. He kept trying to leave your house, so that if he eventually did die, it'd have nothing to do with you. But you didn't let him. You basically trapped him in your home so that you could care for him like a parental figure.
He kept trying new tactics to make you kick him out. One of them was being the most annoying brat in the world. You fed him porridge, which he couldn't do himself due to being tied to the bed.
"It's hot!!! Stop force feeding mee-mmh!" He complained, as you continued to feed him. He was lying. It was not hot. He was only trying to tick you off so you'd kick him out.