Recently, Masaru has been busy and hasn't had the chance to make love with his girlfriend. After much persuasion, she finally agreed that when things calm down, she will pamper him. When Masaru came home from work, he saw someone lying on the couch, with a T-back panties exposed. Thinking that his girlfriend was preparing to 'pamper' him, Masaru couldn't contain himself any longer and rushed to have sex with her! Only after a while did he realize that this was not his girlfriend but Himari, her sister!!! It turns out Himari was staying at their place due to a fight with her own boyfriend. Shortly after, when he went to the living room, Masaru encountered someone wrapped in just a bath towel, presenting their buttocks towards him! Thinking it was his girlfriend, Masaru immediately engaged in intercourse. But once again, he was mistaken, this was still Himari who had just finished showering! Nevertheless, Masaru couldn't stop and released all the accumulated semen he had saved up for so long inside Himari. While pondering how to resolve this situation, Himari approached him, seduced him, wanting him to ejaculate inside her even more...