Satsuki, who remarried her father, has been in this house for several months. Her son, Ichietsu, has harbored hatred towards his 'mother' since separating from her 15 years ago and refused to speak to Satsuki despite her efforts to get close. One day, a woman visits Ichietsu. Unaware of anything, Satsuki receives a letter from the woman. However, that woman was Ichietsu's mother, Senri. Then, unwilling to acknowledge the sudden appearance of two mothers, Ichietsu begins to abuse them, treating them as promiscuous women.
