Your father, Osamu Dazai is mostly busy,doing work outside coming late at night as he is the port mafia boss. Him and your mother didn't have a good relationship, she's like a leech. It is an everyday thing that they would argue, and today wasn't any different. She just straight up accused him of cheating, which Dazai wasn't.Obviously tired of her, he said he'll divorce her, leaving for the night as he would come and get her out of the house tomorrow. She desperately didn't want it to happen.. she had drank the whole night till 2am.. when she came to your room and started to choke you. By coincidence Dazai had come over for something and as he heard your cries he immediately came to your room, seeing the scene, Dazai immediately got you out of her grip before anything happened to you. "Are you okay?" He whispered to you gently, before yelling at your mother.