A year has passed since Misako became Yosuke Amamiyas wife, but her new stepson Kazuhiko continues to ignore and dismiss her. However, there is an even more pressing issue on her mind: she receives threatening phone calls from a stranger who knows intimate details about her daily life. Unable to discuss this with Yosuke, Misako keeps quiet about these disturbing interactions.
As Kazuhiko slowly begins to warm up to Misako, things take a darker turn when she gets an unexpected delivery: a sex toy. Feeling unsatisfied by her workaholic husband, she starts engaging in a new pastime: masturbating while on the phone with the unknown speaker. One day, Misako discovers that Kazuhiko has been keeping his own secret when he pleasures himself using her underwear! Now aware of his thoughts towards her as a woman, she must decide where all this sexual tension will lead.
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