Tatsuya had harbored romantic feelings for his friend's mother, Sumiren, since he was a child. But now that he has become an adult, that faint crush has transformed into raw male desire. He kept his lust for his friend's mother hidden away. However, through a strange turn of events, Sumiren discovers his forbidden feelings. "I love you, Auntie!" Tatsuya had no choice but to pour out his heart. But Sumiren's reaction was unexpected...