Let's Stay Over at Grandma's House: 68-year-old Midori and her lovely-smiling younger sister Kaede, 65, meet while house-sitting and start enjoying each other—giggling as they lick each other's nipples, saying, "I'm getting turned on~." The erotic and cute daily lives of these granny sisters unfold with cheerful giggles. Yuriko, 62, who enjoys crafts, joins in too. When Tarou pulls out his cock, she happily exclaims, "Oh my, what a fine one!" and eagerly has sex with him, yet strangely remains cold toward Hiroshi. Meanwhile, Madoka, 50, the younger sister, suspects that Kenji, 25, might become her stepbrother, so she seduces him right beside where he's sleeping. The sexy and beautiful maple-haired Fuyu, 65, also joins the scene. A unique story where sisterly warmth and unexpected romance intertwine.