Intimate sex lessons with a seemingly gentle piano teacher - Kuroshima Rei (SONE-253)

My girlfriend is learning piano. Her music teacher (Ms. Kuroshima) is elegant, beautiful, and gentle. Lately, things haven't been going well between us, and we haven't made love. Just then, Ms. Kuroshima, who is even more beautiful than my girlfriend, appeared in front of me. So I asked her to teach me piano. She pressed her hand against mine from behind and taught me how to play. Ms. Kuroshima looked like she could be easily pushed down, like she could easily get to me. I couldn't help but squeeze her breasts from behind... "This...no...ah..." This troubled expression made my lust boil.