MRXD-012 A lovey-dovey, masochistic, incestuous life with my super naughty and cute little sister, Umi Hirose.

My younger sister Umi, who had come to Tokyo to attend higher education, ended up staying with my older brother at my house for a while. - As my older brother, I was smiling and having fun living with my younger sister, who still had the accent of her hometown's dialect. - However, one day, out of nowhere, I was having fun with my older brother and sister, playing with each other in a pretend pro-wrestling game, when I saw my younger sister's indescribably masochistic, teary-eyed reaction. - , I couldn't help but be shocked...!