Yui, who ran away from home and was in need due to her clan's lack of understanding, is reunited with her friend's grandfather, who is an acquaintance. However, the elderly man is an addict who sexually exploits young women who lack financial resources. Yui's innocent smile is rough as she poses for the lens, exposing her still-grown, delicate nude body. A bloated, reddish-black phallic cock is inserted into Yui's vine manhood, and the old man's semen pours into the back of her vagina.