Lesbian Ninjas' Erotic Techniques v2

Kohaku and Kunoichi engage in erotic adventures once again as they visit a waterfall near hot springs for some sex training. The girls experiment with various dildos and lesbian sex techniques while enjoying the cascading waters. Later, Kohaku ventures to a laboratory to explore an advanced sex machine disguised as an ordinary chair. After extensive examination, she invites Kunoichi to join her in unlocking its full potential through a series of experimental sessions.