BKD-286 - Reunion after 20 years, a forbidden night with my mother

Masaaki, 25, has lived with the longing for his mother who left when he was young. One day, he receives a letter from his mother, Ema, asking to meet after 20 years. He heads to a nostalgic hot spring, only to find her more beautiful and alluring than ever. His dormant longing quickly turns into uncontrollable desire as the tension between them begins to boil over.