Living with my sister (Kokoro) suddenly started in my small apartment living alone in Tokyo. Kokoro, who has grown rapidly into big breasts before I know it, is super defenseless at home and is always in a porori state, so I have trouble with my eyes! I couldn't stand it and forcibly attacked it and vaginal shot ... However, that night, "I've been for a long time ...", and this time, I asked for vaginal shot sex from my heart! We have a secret relationship that we can never tell our parents ...