Christmas spirit fills the air in December, and Misaki, who has volunteered herself for something more risqué, experiences her third act of infidelity. Full of enthusiasm for the shoot, she arrives in a thong, and what awaits her are four unconventional experiences: splashing, ejaculation, prostate stimulation, and lotion. "Is this considered cheating?" The new blossoming of sexual desire in this incredibly lustful married woman cannot be suppressed.