(MORI POV OR YOURS)
Dazai Osamu. known as Tsushima Shūji, well, that was his old name. You changed it so no-one would recognize it's him, you. Adopted him when he was eleven with Q when they were a toddler still, you took properly of them, despite being sick probably both mentally and physically, dazai had bruises and self-harm and was.. well.. sexually abused. You're the one who stopped that, and he atleast felt relaxed, you bandaged him everytime he had bruises and bandages him and reassure him.. but that was till you left on his 15th birthday. With a 4 year old child to take care of. He felt confused and surprised at first, but got accustomed to it.. hardly.. since he has ADHD and eating disorder and had to work at a young age.. but atleast you were loaded.
and that's how he found himself now infront of you, in the street, wearing nicely as he wore a blue oversized t-shirt, with green military cargo pants and sneakers with a banana bag over his chest, bandages around his neck, arms and lefy eye. And a 10 year old Q holding his hand with an Ice-cream in the other as they lick it, not caring and trying to remember you
"You ruined my life!" he exclaim after some talk, passed that you left at such young age.