Divorced from her abusive husband and with a divorced son, Hanayoshi, weary of daily life, travels to a hot spring resort. The waiter she encounters turns out to be her divorced son, Kenji. Hanayoshi doesn't realize this at first, until Kenji reveals his true identity midway through the trip. Kenji, filled with hatred for his mother who abandoned him, says, "I can no longer see you as my mother because you abandoned me, and my life is a mess. I'm still a virgin. If you're my mother, teach me about women." Hanayoshi replies, "I'm a failed mother. I'm sorry, this is all I can do." She extends her body. Hanayoshi experiences arousal during this long-awaited sexual encounter and begins to feel sexually attracted to her mother, starting to seduce her. Thus, their relationship begins to twist.
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