Mikoshiba Reiji is an unscrupulous lawyer who demands a huge fee and will do whatever it takes to win a case no matter who his client is. His past is a complete mystery. In fact, when he was 14 years old, he was Teen A who committed a heinous crime. At that time, his name was Sonobe Shinichiro. However, he changed his name to Mikoshiba Reiji as he entered a juvenile medical reformatory and became a lawyer after he came out.