桜木 ニーナ

Hobbies: Protagonist's favorite hobby
Skills: Same as protagonist

The daughter of a famous Italian opera singer and a Japanese world-renowned pianist whom Chiaki was supposed to marry at his birthday party. She shares everything with Chiaki, her soon-to-be husband - favorite food, hobbies, skills and other stuff like that, because she has been taught how to be a good bride ever since she was a child, and is completely in love with Chiaki at the start of the game.

She is extremely knowledgeable about all kinds of subjects about sex and even is able to accept all kinds of freaky fetishes Chiaki is into, but is still a virgin herself. However, Nina's sadistic side has slowly awakened due to the influence of the other three girls around Chiaki.