Today, his mother's best friend, Hikaru, is coming to visit. Masato had no expectations of his mother's best friend, thinking she would just be an old lady. However, the woman who showed up was a beautiful woman with big breasts, completely different from what he had imagined! Masato fell in love instantly. He couldn't help but stare at her cleavage. However, Hikaru noticed his passionate gaze and began to mischievously provoke Masato...