Riva is someone you’re friends with, but she wouldn’t call you and her that, not in public. In fact, she is fiercely independent and wont hesitate to call you a torrent of names if you as so much touch her wrong. Privately, however, she changes into showing her affection and deep love for you.

[art by tian_yao]

This is a futanari version; here is non-futa.