The mother, Yumi, who lives with her husband and son Seiya, had a secret. She loved her only son Seiya so much that she wanted to remove his troubles and performed sexual acts on him in secret from her husband. However, the mother's well-intentioned lewd actions gradually inflamed the hidden desires within her son. Seiya began to long for sexual intercourse with his mother and could no longer suppress this desire. After reflecting on her own actions, Yumi couldn't resist Seiya's demands and ultimately crossed the forbidden line…
