Marina before dating Kenji when she was a high school student. In the first prequel, she is a female student in her third year. She had been dating a classmate for about three months, but she broke up with him because she was tired of being pushed around. She had sex a few times, but it was always selfish and painful. She never felt anything. Because of this, she started thinking that if she was going to date someone, she would date someone older. [Translated from Gyutto]