Married woman Kana has always quietly and neatly supported her husband and family, but behind this facade, she suffers from being ignored by her husband and enduring sexual frustration. Secretly, she explores relationships resembling adultery through an SM-themed mobile site. One day, on a whim, she registers with a dating site and is suddenly approached by a man, gradually falling into his control and training. This affair-like romance slowly tears apart her heart.