Perverted Pleasure: Forbidden Lips

Original title: 異常な快楽　禁唇

Eriko and her silent brother Makoto live together. One day, while the two are drinking at a bar, Eriko's boyfriend Junichi comes in. Eriko introduces him to her, but Makoto gets up from the table looking annoyed. Eriko, who he loves like a daughter, has a boyfriend...