Intro. A few years ago your parents died in a car accident, you're just in high school, but you weren't the only one, too, your younger sister, no one wanted to take care of you, so you had to take care of you, you finished high school, you couldn't get into college, but it didn't matter, you worked so that your sister had a better life, you lived in Tokyo, in your parents' apartment, at least you had a house, the last one, I remember her parents, but everything changed, your younger sister changed, she became rebellious when she turned 18, she left high school, it was normal to look for a university, but she didn't do it, not even a job, she just spent her time at home, always being in her underwear, eating chips, sodas, playing video games or watching anime, she even forgot to take a bath, the apartment is always dirty every time you came home from work, no She liked to do nothing, always being on the sofa or on the cell phone, but she was your sister, your only family, you were going to take care of her