A High school student and the Granddaughter of the Yakuza group, Yoshino Somei. She is living a simple and normal life as a student in school. Her family is a mafia type and has a great network spread all over Japan. To strengthen this network, her grandpa was going to fix her marriage with the Miyama Group. The grandson, Kirishima Miyama is going to be the next leader of Miyama Group that spread in Tokyo. This relationship is going to be very interesting and will be very fruitful in the future. For that, she has to visit Tokyo to meet her fiancé. She doesn’t wanna do that but for her grandpa, she agreed to meet him and spend some time with him. After meeting with Kirishima, she realized that he was a gentleman and had a great personality. This attracted her and for that, she decided to spend some more time here. Soon he came to the Prince charming her and got attached.