Makiyama Rihoko

The beautiful and mysterious health teacher with a calm friendly smile, hiding a more sinister personality.
She is a strikingly gorgeous woman who never stops smiling. An in-depth knowledge of medicine and is an outstanding researcher, having won a medical prize as a student. She has many admirers, but she doesn't plan on having a lover. She assist the protagonist out of curiosity and amusement. She is fascinated by his special semen and cooperate for further analysis.