Konatsu is the second of three sisters who has also had her boyfriend stolen by her older sister. She made the third sister go through the same painful experience! Konatsu likes her younger sister's boyfriend and uses her big breasts to seduce him, saying, "You can cum inside me!" She feels bad for her younger sister, but she does all sorts of naughty things like giving him a blowjob in secret, inserting her dick raw, and letting him cum inside her! She ends up finding out, but in this house, the younger sister's boyfriend belongs to her older sister!