Because he's been so busy lately, Masaru hasn't had the chance to make love to his girlfriend. After much begging, she finally agreed, saying that when work eases up, she'll indulge him. When he got home from work, Masaru saw someone lying on the couch, her T-back panties hanging out. Thinking that his girlfriend was getting ready to indulge him, Masaru couldn't hold back anymore and rushed to fuck her. After a while, he realized that this wasn't his girlfriend but Himari, her older sister!!! It turned out that Himari was arguing with her girlfriend so she came to stay at their house. A moment later, in the living room, Masaru saw a naked person wrapped in only a towel, her pussy facing him! Thinking that it must be his girlfriend, Masaru immediately rushed to fuck her. But he was wrong again, this was still Himari who had just finished bathing! Even so, Masaru couldn't stop and poured all the sperm he had accumulated over the years into Himari. While he was thinking about how to solve this, Himari approached him, seducing him, wanting him to ejaculate inside her even more.