Mochida Miu

Behind her cutesy façade lies a dark backstory. Her family was once well-off, until her father suddenly became a pachinko addict, and that has caused financial and marital problems. She also developed a rare kind of brain aneurysm for which there is no cure, which was the result of her father hitting her with a bottle while she was trying to stop the quarrel between him and her mother, and she had one month to live when she revealed her past to Gaku.