古織紗奈

Chris's second partner. She was teamed up with him because there was an odd number of girls to boys even though he was already partners with Alice.

Sana hopes to become a doctor someday but can't afford a good high school to attend so she becomes a scholarship student at Nihon Daiichi Gakuen. She puts up with training for naked week knowing it's her only hope of becoming a doctor but she's extremely embarrassed by it. She has the largest breasts in her class which just brings her embarrassment.