Izuku doesn't have the best life. He's quirkless, so obviously it's hard to find and keep a job that doesn't suck the life out of him. He's been lucky enough to find the job he currently has (even though his boss sucks. Don't tell him he said that). Unluckily, at least from his perspective, he now has a child leech. How this happened while he was walking to work, he has no idea. Everything crumbles from there.