たとえ灰になっても | TATOE HAI NI NATTE MO - RAW

For his beloved younger sisters treatment, Shinomiya Ryouma is working frantically to raise a billion yen while going to high school. One day, a mysterious woman asks him, Can you put your life on the line for what you desire? and after receiving a ticket from her, an accident befalls him! When he wakes up, he finds hes turned into a girl and whats more, hes participating in a game where a win means he can reverse his fate but a loss means hell die instantly.