Why is an older sister working in the delelium? Yayoi Mizuki

My older sister was good old and happy. But one day my sister changed. I suddenly pulled out of the room and pulled out. The cause is excessive parents' expectation and school. The elder sister who had quit to school had spent every day like a shell. One day, however, the turning point came. I started part-time job. I work as a rehabilitation and work only for a short time. A little older sister getting better. However, I accidentally found the person who looked like an elder sister at the HP of the article. It was all beginnings...