Why do they seem so grown-up despite only being a few years apart in age? The senior female student kindly gives advice, and even gives a hand job, blowjob, and intercrural sex. He promises to just rub her, but he can't resist and penetrates her... and cums inside her! A total of four high school girls, including his real sister and childhood friend, are featured in dream situations! A bittersweet, sweet and sour. And a squid-smelling short drama for adults.