Hajime went to his girlfriend's house for the first time, eager to have sex. Even though they had been dating for a while, she was too serious and still wouldn't let him do it. In contrast, her sister Chiaki was open about sex, full of flaws, and bold. Hajime developed an inexplicable fondness for her... His girlfriend who still wouldn't let him have sex, and her sister with fair skin and large breasts who was open about sex... Moreover, her sister, who was in the prime of her life and wanted sex, seduced him with dirty talk, and he easily fell and became engrossed in adulterous sex. This is a sleazy story.
