Mature lesbian stepsisters, true masochist sisters who can't resist their lewd sadistic sisters

Ryoko lost her parents in an unexpected accident when she was young. The Hojo family adopted Ryoko, who had no relatives. Ryoko's parents-in-law were very kind people, and her sister-in-law, Maki, loved Ryoko as if she were her own sister. One day, several years later, Ryoko, who had started living on her own as an adult, receives a phone call. It was from Maki, who was divorced. That night, Maki, who came to stay the night, suddenly started touching Ryoko's body in a thoughtful manner, completely different from the atmosphere they had when they lived together.